Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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isotope notation learning intention: we will understand how to represen…
9. $\ce{^{57}_{26}Fe}$ 10. $\ce{^{58}_{26}Fe}$ 11. $\ce{^{16}_{8}O}$ 12. $\ce{^{17}_{8}O}$ 13. $\ce{^{18}_{8}O}$
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which of the following elements has the same number of valence electron…
D. Aluminum, Al, atomic #13
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13. which of the following best explains how chemical weathering can br…
Acid rain reacts with minerals in the rock, causing it to weaken and dissolve.
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atomic structure worksheet date: ① identify the each of the parts of th…
1. Atomic number = 8, Atomic mass = 15.999, # of protons = 8, # of electrons = 8, # of neutrons ≈ 8 2. Protons = 22, Neutrons = 26 3. Mass number = 223, Symbol = Fr, Charge = +1 4…
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what method can be used to separate parts of a liquid mixture when the …
1. B. distillation 2. B. False
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having varying properties is a characteristic of a mixture. * true fals…
1. True 2. B. honey
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the substances in a(an) distributed throughout the mixture. mixture are…
homogeneous
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matter that always has exactly the same composition is classified as a(…
C. pure substance
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a scientist uses an instrument to observe the pattern of the molecules …
B. solid
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the symbol for gold is * 5 points o al o au o gl o go
B. Au
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directions: write and draw the electron configurations and orbital nota…
1. Titanium: Electron - configuration: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{2}$, Orbital notation as described above. 2. Aluminum: Electron - configuration: $1s^{2}2s^{2}2p^{6…
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which of the following is not a pure substance? * 5 points water milk o…
milk
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you are about to open a container of soy milk but notice that there are…
suspension
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sch4u alcohols, ethers, aldehydes, ketones, carboxylic acids, est part …
1) Structure of 2 - chloro - 2 - iodo - 3 - ethylhexanoic acid: $CH_3CH_2CH(CH_2CH_3)C(Cl)(I)CH_2COOH$ 3) Structure of 2 - ethylbutylbenzoate: $C_6H_5COOCH_2CH(CH_2CH_3)CH_2CH_3$
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write the names of the following covalent compounds: 21) so₃ 22) n₂s 23…
21) sulfur trioxide 22) dinitrogen sulfide 23) phosphorus trihydride (phosphine) 24) boron trifluoride 25) diphosphorus tetrabromide 26) carbon monoxide 27) silicon dioxide 28) su…
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write the complete full electron configurations(e.g. 1s²2s²2p⁵) and abb…
1) - # of e⁻: 3 - full e⁻ configuration: $1s^{2}2s^{1}$ - abbreviated (noble gas) e⁻ configuration: $[He]2s^{1}$ 2) - # of e⁻: 16 - full e⁻ configuration: $1s^{2}2s^{2}2p^{6}3s^{2…
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religion followed the gospels. in the last two years of his confinement…
There is no information in the provided text about when the lawyer read "nothing but the Gospel". So, no correct option can be chosen from the given ones.
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2.06 electron configuration practice worksheet in the space below, writ…
1) $1s^{2}2s^{2}2p^{2}$ 2) $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{10}5p^{2}$ 3) $1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}$ 4) $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{1…
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the element helium is represented in the periodic table by its symbol, …
# Breve explicación: En inglés, cuando se trata de posesión plural, si el sustantivo es plural y termina en "s", solo se agrega una coma ('), no una "s" adicional. "Tables" es el …
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a. two valence electrons in the fourth energy level, element = ________…
a. Element: Calcium b. Element: Oxygen |Symbol|Element Name|# of Valence Electrons|Group| | ---- | ---- | ---- | ---- | |Li|Lithium|1|1| |S|Sulfur|6|16| |Ba|Barium|2|2| |P|Phospho…
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adding compounds worksheet 2 2c₂h₅oh 1. carbon = 4 2. hydrogen = 12 3. …
6. 4 7. 1 8. 4 9. 2 10. 2 11. 2 12. 2 13. 1 14. 4 15. 4 16. 6 17. 12 18. 12 19. 2 20. 7 21. 2 22. 2 23. 10 24. 5 25. 9 26. 3 27. 14 28. 1 29. 2
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e: if the statement is true, write true in the blank. if it is false, i…
1. true 2. delocalized 3. true 4. Lewis structure
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brief instructions an electron configuration is a method of indicating …
1. $1s^{2}2s^{2}2p^{6}3s^{1}$ 2. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{5}$ 3. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}$ 4. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}…
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ph measures the acidity of a substance, and is described by the equatio…
$7.3$
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part 2: fill in the blank 1. always wear ____________ when working in t…
1. safety gear 2. hydrated 3. rope 4. turn off 5. manufacturer's
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ph measures the acidity of a substance, and is described by the equatio…
A. $3.16\times10^{-6}$
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part 1: matching match the safety rule with the correct category: 1. al…
1. Hand Tools Safety 2. Tractor & Machinery Safety 3. Chemical Safety 4. Chemical Safety
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ph measures the acidity of a substance, and is described by the equatio…
$5.2$
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ph measures the acidity of a substance, and is described by the equatio…
$pH = 7$ The substance is neutral.
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reitz integrated chemistry physics force test 2025 to do: receive a gra…
Net Force: $240\ N$ Acceleration: $4\ m/s^{2}$
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olfaction: sense of smell explain the structures and functions of this …
The sense of smell is unique due to its direct link to the limbic system, its ability to detect a wide range of chemical substances (including pheromones), and its distinct neural…
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which best describes the structure of the poem \safari day in kenya\? f…
# Breve explicación: El verso libre no sigue una estructura rítmica o de rima estricta y puede tener longitudes de línea variadas. Sin conocer específicamente el poema, pero basán…
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2. what type of chemical reaction took place when you mixed lead (ii) n…
1. Double - displacement reaction; reactants are ionic compounds. 2. $Pb(NO_3)_2 + 2KI ightarrow PbI_2+2KNO_3$ 3. As above. 4. They should be equal according to the law of conserv…
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12 multiple choice 1 point select the appropriate choice that describes…
nonpolar
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11 multiple choice 1 point select the appropriate choice that describes…
Without seeing the actual structure details, it's hard to be certain. But if we assume a general understanding of molecular polarity concepts: If the molecule has an even distribu…
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10 multiple choice 1 point select the appropriate choice that describes…
polar
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reitz integrated chemistry physics force test 2025 question 6 not yet a…
C. Newton's Third Law
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where are nonmetals located in the periodic table? o along the upper le…
E. along the upper right side
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9 multiple choice 1 point select the appropriate choice that describes …
polar
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which statement best describes the difference between a physical change…
D. A physical change is a change from one state of matter to another, a chemical change results in a new substance formed
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which property is a physical property? o malleable o does not burn o be…
malleable
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8 multiple choice 1 point select the appropriate choice that describes …
nonpolar
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what is the smallest particle representing water? a hydrogen atom an ox…
a molecule
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two atoms that are isotopes of one another must have the same number of…
B. protons
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7 multiple choice 1 point select the appropriate choice that describes …
B. polar
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what is the atomic number of an atom? o the number of neutrons o the nu…
The number of protons
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complete the paragraph about the syrian civil war. unrest in syria bega…
Russia
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what information does the atomic mass of an element provide? o the numb…
the number of protons and neutrons in an atom
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select the correct answer from each dropdown menu. complete the paragra…
chemical
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6 multiple choice 1 point select the appropriate choice that describes …
nonpolar
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writing nuclear equations 1. write the nuclear equation showing actiniu…
1. $^{227}_{89}Ac ightarrow^{227}_{90}Th+^{\ \ 0}_{- 1}e+\bar{ u}$ 2. $^{10}_{3}Li$
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question 3 (1 point) saved pain is a physiological process that is expe…
Question 3: False Question 4: 24 hours or less Question 5: Slow heartbeat
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multiple choice 1 point select the appropriate choice that describes th…
polar
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3 multiple choice 1 point select the appropriate choice that describes …
polar
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2 multiple choice 1 point select the appropriate choice that describes …
nonpolar
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1 multiple choice 1 point select the appropriate choice that describes …
nonpolar
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writing nuclear equations 1. write the nuclear equation showing actiniu…
1. $_{89}^{227}\text{Ac} ightarrow_{87}^{223}\text{Fr}+_{2}^{4}\text{He}$ 2. $_{6}^{14}\text{C}$
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which of the following is an effect of waters high specific heat? a. th…
B. the moderation of temperatures near bodies of water
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a certain molecule contains two carbon atoms joined by a single bond. w…
C. 6
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silica, the primary component of sand and quartz, combines si + o₂ -> s…
1. Heterogeneous mixture 2. Group 14 (IVA) 3. Elements in Group 14 have 4 valence electrons and form covalent bonds by sharing them. 4. 14 protons, 14 neutrons (common isotope), 1…
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homework: classifying matter complete the following homework assignment…
1. $-36.1^{\circ}C$ 2. Compound
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the diagram shows a coil of copper wire wrapped around an iron cylinder…
They can use the temporary magnetic field it creates to pick up metal paper clips.
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15. what aspect of lunar rocks has been studied through radiometric dat…
C) Their formation processes
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15. what aspect of lunar rocks has been studied through radiometric dat…
C) Their formation processes
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decide whether these proposed lewis structures are reasonable. proposed…
1. No, it has the wrong number of valence electrons. The correct number is: 8 2. Yes. 3. No, it has the wrong number of valence electrons. The correct number is: 10
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radiometric dating has wide - ranging applications. on earth, it helps …
1. B. Potassium-40 2. B. Marie Curie 3. B. Lead 4. B. It requires a closed system. 5. A. 5730 years
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what is common between transverse waves and longitudinal waves? both in…
B. Both move faster at higher temperatures
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try again your answer is incorrect. . row 1: clo⁻: your answer is incor…
1. **For \(ClO^-\)**: - No, it has the right number of valence - electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are: \(Cl\) - Calculate the number …
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what is a solvent? the process in which neutral molecules lose or gain …
The substance that does the dissolving in a solution.
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which of the following refers to the substance that is being dissolved …
B. solute
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a mixture of two or more evenly spread out substances is known as a wha…
A. solution
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17. which of the following solutions is the weakest acid: a. a solution…
17. c. a solution with a pH of 6.4 18. e. is neutral 19. d. hydrochloric acid 20. a. carbohydrates 21. e. proteins 22. c. a triglyceride
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14. when a pair of electrons is shared equally between two atoms, the b…
14. d. nonpolar covalent bond 15. d. base 16. a. hydrogen bonding between water molecules
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energy release quick check which statement about the balanced equations…
A. A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the number of atoms before and after the change.
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what term do environmental scientists use to describe the increased con…
C. biomagnification
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13. what is the atomic number of the atom in figure 2.2: a. 2 b. 3 c. 4…
d. 6
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7. the major function of potassium is to: a. serve as a salt in bones a…
7. B. play a role in nerve impulse transmissions and muscle contractions 8. A. it is present in bone, and is an important cofactor for enzyme activity in a of metabolic reactions …
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identify the choice that best completes the statement or answers the qu…
1. B. NaCl 2. C. cation 3. C. water 4. B. oxygen 5. A. increased temperature 6. E. protons and neutrons
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chapter 12: cleaning and sanitizing 36. what step must managers take af…
36. a. Monitor the cleaning program. 37. c. Identify cleaning needs in the operation. 38. b. During all hours of operation
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chapter 12: cleaning and sanitizing 30. how should glassware be stored …
30. b. Upside down 31. a. common name of the chemical 32. b. Away from prep areas 33. d. Emergency shower system 34. d. Hanging on a hook 35. a. Label the working container with i…
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name period periodic trends - practice questions instructions: use the …
# Explicación: ## Paso 1: Identificar masas atómicas Usando la tabla periódica, la masa atómica de Mg es aproximadamente 24.31 u, la de Cr es aproximadamente 52.00 u y la de Li es…
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decide whether these proposed lewis structures are reasonable. proposed…
1. Yes. 2. Yes. 3. Yes.
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decide whether these proposed lewis structures are reasonable. proposed…
For $COCl_2$: Yes. For $H_2O$: Yes. For $ClO^-$: Yes.
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decide whether these proposed lewis structures are reasonable. proposed…
1. Yes. 2. Yes. 3. Yes.
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decide whether these proposed lewis structures are reasonable. proposed…
1. Yes. 2. Yes. 3. Yes.
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chapter 12: cleaning and sanitizing 12. what can reduce the effectivene…
12. a. Leftover detergent 13. c. At least 10 seconds 14. d. At least 30 seconds 15. b. Knives 16. b. Cutting boards 17. b. Before working with a different type of food
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chapter 12: cleaning and sanitizing 6. what is the definition of saniti…
6. d. Reducing the pathogens on a surface to safe levels 7. d. Use a test kit to check the sanitizer's concentration when mixing it. 8. b. Concentration 9. a. heat. 10. c. 171°F (…
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1) in each question, identify the element with the greatest atomic radi…
# Explicación: ## Paso 1: Recuerda la tendencia de radio atómico El radio atómico aumenta hacia abajo en un grupo y hacia la izquierda en un período en la tabla periódica. ## Paso…
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the metal featured in both the structure of the shimogamo machiya villa…
C) The text cites examples of a design trend and then briefly establishes the principles underlying the trend.
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periodic trends - practice questions instructions: use the periodic tab…
# Explicación: ## Paso 1: Consultar masas atómicas Usando la tabla periódica, la masa atómica de Mg es aproximadamente 24.31, Cr es aproximadamente 52.00 y Li es aproximadamente 6…
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instructions: in each question, identify the element with the greatest …
# Explicación: ## Paso 1: Recordar la tendencia de reactividad en la tabla periódica Para los metales, la reactividad aumenta hacia abajo en un grupo y hacia la izquierda en un pe…
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which of the following is a benefit of pesticide use? lower costs of fo…
lower costs of food
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ionic match - maker objective: create your \singles ion ad\ and make 5 …
Match #1 Formula: $Rb_3P$, Name: Rubidium phosphide, Bond creation: 3 $Rb^+$ ions bond with 1 $P^{3 - }$ ion due to electrostatic attraction. Match #2 Formula: $Rb_3N$, Name: Rubi…
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what is ddt? a natural substance used in organic farming a pyrotechnic …
C. a popular pesticide used during world wars
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instructions: in each question, identify the element with the greatest …
# Explicación: ## Paso 1: Recordar la tendencia de electronegatividad en la tabla periódica La electronegatividad aumenta hacia la derecha y hacia arriba en la tabla periódica. ##…
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instructions: in each question, list the elements from least to greates…
# Explicación: ## Paso 1: Recuerda la tendencia de radio atómico en la tabla periódica El radio atómico aumenta hacia abajo en un grupo y hacia la izquierda en un período. ## Paso…
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day 3 (10/7) 1. write the name for h₈p₆. 2. write the name for sncl₃. 3…
1. Hexaphosphoric acid 2. Tin(III) chloride 3. $GaBr_{3}$
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name: period: ionic & covalent bonds: names & formulas *ionic - write t…
1. Potassium bromide 2. Barium nitride 3. Calcium nitride 4. Diphosphorus pentoxide 5. Carbon monoxide 6. Carbon tetrachloride 7. Triphosphorus hexoxide 8. Sulfur dioxide 9. Nitro…
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instructions: in each question, identify the element with the greatest …
# Explicación: ## Paso 1: Recordar la tendencia de la energía de ionización en la tabla periódica La energía de ionización aumenta hacia la derecha y hacia arriba en la tabla peri…
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true or false: carbon can be in the atmosphere, in living things, disso…
True