Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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question 20 0.4 pts what is the number of electrons in the outermost en…
Question 20: 6 Question 21: energy level Question 22: 2
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what is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p? 3f 3d…
D. 4s ### Question 2
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which of the following electron configurations is impossible? o 1p² o 2…
1. The impossible electron - configuration is: $1p^{2}$ 2. The highest energy level in a silver atom is: 5
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what is the maximum number of electrons in the second principal energy …
First question: O 8 Second question: O frequency
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select all the correct answers. which changes will increase the rate of…
- B. adding more oxygen to the reaction - D. changing the reactants from solid form to powdered form
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question 12 0.4 pts a major difference between a 1s orbital and a 2s or…
Question 12: the 2s orbital is at a higher energy level Question 13: s, p, and d only
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question 9 0.4 pts which element has the electron - configuration- 1s² …
Question 9: D. chlorine Question 10: D. 3s Question 11: C. 3
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when using chemical sterilization, how long do instruments need to be s…
B. 10 hr
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what is the electron - configuration of potassium? o 1s² 2s² 3s² 3p⁶ 3d…
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}$
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using the drop - down menus, complete the table to summarize the proper…
| Particle | Charge | |--|--| | Proton | +1 | | Neutron | 0 | | Electron | -1 |
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question 5 0.2 pts which element has the maximum number of dots in its …
- Question 5: C. Ar - Question 6: D. drops from a higher to a lower energy level - Question 7: A. As
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question 2 0.2 pts electronic configuration helps us understand the ___…
Question 2: A. energy Question 3: D. 5 Question 4: C. [Ar]4s2 3d10 4p3
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question 28 (2 points) key characteristics of the stomach as a digestiv…
E. acidic pH, begins protein digestion
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question 1 the f sublevel can hold how many electrons? 10 8 14 12
O 14
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assignment active predicting chemical behavior which elements can form …
- sulfur - arsenic - selenium - silicon - antimony
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which region is indicated by label b? orbitals electron nucleus which r…
Which region is indicated by label B? - Nucleus Which region is indicated by label A? - Orbitals
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crushed chalk or whole chalk chemistry pre - lab questions 1. what is t…
1. Likely the reaction between chalk and an acid. 2. A chemical reaction is a process of substance transformation. Clue: Gas production. 3. Reactants: Calcium carbonate and acid. …
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drag each statement to the correct location on the chart. classify the …
Synthesis: Sodium (Na) reacts with chlorine (Cl) to give sodium chloride (NaCl), A strip of magnesium (Mg) burns brightly in oxygen (O₂) to form a white powder, magnesium oxide (M…
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what is oxygen debt? o amount of oxygen breathed in with each breath du…
The amount of oxygen needed to restore the body’s resting state after strenuous exercise
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5. what is an atom? a: 6. who was the first person to use the word atom…
5. Un átomo es la partícula más pequeña de un elemento químico que conserva sus propiedades químicas. 6. Demócrito fue el primero en usar el término, pero John Dalton propuso la t…
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in an electrically neutral atom, the number of protons equals the numbe…
protons equals the number of electrons.
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if all the orbitals shown in the three - dimensional model are complete…
C. 10
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the figure is a three - dimensional representation of an atomic orbital…
D. three p-orbitals
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the electron shell model of an atom has three main components: the ener…
orbitals subshell energy shell
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chemistry:earth sys a: term af - period 2 - rm c202 (lms) quiz: modern …
probable
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module 3: safety data sheets (sds) and the hazard communication standar…
d) Chemical
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what are the properties of the aluminum in the can? check all that appl…
It conducts electricity well. It is solid. It does not react easily with water or air.
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6 which of these describes a polymer? a large molecule made of smaller …
A. large molecule made of smaller subunits
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the graph shows the energy involved in two chemical reactions. which st…
D. The data plotted for Reaction A and Reaction B indicates that reaction B requires less activation energy.
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the model shows water molecules interacting. the gray circles represent…
C. Oxygen atoms in water molecules are also attracted to hydrogen atoms in other water molecules.
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complete the table below. an example of how to fill out the table is in…
| Element | Full electron configuration | Noble gas configuration | | ---- | ---- | ---- | | Phosphorus | 1s2 2s2 2p6 3s2 3p3 | [Ne] 3s2 3p3 | | Tin | 1s2 2s2 2p6 3s2 3p6 4s2 3d10…
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which statement describes a physical property of copper? it reacts with…
It can be reshaped by a force.
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which best describes a compound such as sodium chloride? a pure substan…
a pure substance that can be separated into different elements by chemical means
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five milliliters (ml) of alcohol is poured into a beaker that contains …
D. alcohol and salt
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type the correct answer in each box. the atomic number of sodium (na) i…
15; 15
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a chemist is studying an unknown substance and could break the substanc…
pure substance
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solute crystals are added to a solution until they begin to sink to the…
unsaturated
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the table shows the percentages of hydrocarbons that are found in a sam…
a mixture
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drag the tiles to the correct boxes to complete the pairs. identify the…
1. combustion reaction of fossil fuels 2. respiration 3. photosynthesis
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which list includes only physical properties? o density, reactivity, an…
boiling point, conductivity, and color
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what can a drop of liquid mercury be described as? a pure substance and…
a pure substance and an element
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select the correct answer. which chemical reaction absorbs energy? a. p…
A. photosynthesis
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a student performs the following experiment. step 1: she pours a colorl…
A. a chemical change in step 1 and a physical change in step 2
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the picture below shows a mixture that was stirred 3 minutes ago. what …
Not a colloid (it is likely a suspension)
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complete the table below. an example of how to fill out the table is in…
| Element | Last electron configuration of element | Noble gas that comes before | Last electron of Noble gas that comes before | Electron configuration after the noble gas and la…
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which substance is a mixture? o table salt o gasoline o aluminum o carb…
gasoline
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what distinguishes electronegativity from electron affinity? * 1 point …
A. Electron affinity measures actual energy released when gaining an electron D. Electronegativity measures electron attraction in compounds
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which physical method can be used for obtaining a sample of salt from a…
A. boiling
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which statements are true of heterogeneous mixtures? 1) they settle out…
1 and 2
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how do electronegativity values change moving from left to right across…
1. They increase due to rising nuclear charge 2. Fluorine
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what type of mixture scatters light and cannot be filtered easily? a co…
a colloid, a heterogeneous mixture
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why do metals typically have low electronegativity values? * 1 point th…
First question: They tend to lose electrons to become more stable Second question: A complete exchange of electrons happens
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what happens to the principal energy level when electrons are removed t…
It decreases
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which process is a chemical change? burning a match boiling water melti…
burning a match
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complete the table below. an example of how to fill out the table is in…
| Noble gases | Atomic orbital location (s,p,d,f) | Row of element | Column of element in orbital location | Last electron configuration of element | | ---- | ---- | ---- | ---- |…
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when electrons are added to an atom, what happens to the ions size? * t…
1. The ion becomes larger 2. Group 16 elements add two electrons, while group 17 elements add only one
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which statement describes an intensive property of matter? it is the sa…
It is the same for every sample of a single substance.
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why does a cation become smaller when electrons are removed from an ato…
1. Protons now outnumber electrons, drawing remaining electrons closer to the nucleus 2. X - ray crystallography
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which heterogeneous mixture contains large particles that can settle ou…
D. suspension
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the table below shows four samples of carbon dioxide gas and the temper…
A. 1
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in what state are electron affinities typically measured? * plasma stat…
D. Gaseous state
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what is the name of a solution whose concentration of solute is equal t…
B. saturated
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how are electron affinities typically expressed? * as positive numbers …
1. D. As negative numbers 2. D. They become more negative from left to right
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how does carbon return to the soil? combustion of fossil fuels transpir…
Decomposition of organic matter
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which factor causes a decrease in the rate of dissolution? o decreasing…
decreasing the surface area of the solute
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complete the table below. an example of how to fill out the table is in…
| Element | Atomic orbital location (s,p,d,f) | Row of element | Column of element in orbital location | Last electron configuration of element (use the boxes from before) | | ---…
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why do halogen elements have particularly large negative electron affin…
For the first question: Adding an electron completes their noble gas electron configuration. For the second question: Energy is released.
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which electrons typically have lower ionization energies in an atom? * …
Valence electrons
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which factor contributes to electron shielding in an atom? * outer elec…
1. C. Inner shell electrons 2. A. kJ/mol, B. Electron volts
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complete the analogy. crocodile is to reptile as oxygen is to chemistry
gas
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what happens to ionization energy as you move down a group in the perio…
1. Decreases gradually 2. Nuclear charge increases
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what causes atoms to be pulled closer to the nucleus as you move across…
Increased positive nuclear charge
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in a response of two well - developed paragraphs, compare and contrast …
In "Mending Wall", the structured dialogue and use of the wall as a symbol create a complex exploration of human relationships. In "The Rainy Day", the regular rhyme scheme and th…
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in what units are atomic radii typically measured? * nanometers picomet…
1. Picometers 2. More principal energy levels are introduced
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pre-ap chemistry bellwork 10/14 answer the following questions: an atom…
- The atom has 11 neutrons. - The chemical formula for an atom with 15 protons is P. - An ion is an atom or molecule with a net electrical charge due to the loss or gain of electr…
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what happens to atomic radius as you move from left to right across a p…
Radius decreases gradually
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how is atomic radius typically defined? * the total diameter of an atom…
One - half the distance between nuclei of identical bonded atoms
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market research reading quiz question 5 of 10: which is an example of a…
D. All of the above
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question 22 please match the key word to the correct definition. column…
1. b 2. e 3. f 4. c 5. a 6. d 7. g
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any chemical that effects the bodys structure or function is known as a…
Question 1: B. drug Question 2: D. 21 Question 3: A. 5
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any chemical that effects the bodys structure or function is known as a…
Question 1: B. drug Question 2: D. 21 Question 3: A. 5
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what is a photon? a. part of a division b. part of a chorus c. a light …
C. A light particle
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there are several different models that represent compounds. one type o…
a ball - and - stick model
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two models of the same compound are shown. c₂h₄o₂ model a model b in wh…
Model B shows how the atoms in the molecule are connected, but Model A does not.
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two models of the same compound are shown. in what way is model a bette…
Model A shows the three - dimensional shape of the molecule, but Model B does not.
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match the correct atomic model to the correct scientists and descriptio…
1. a. For Li: Draw a small circle in the center to represent the nucleus with 3 protons and 4 neutrons (neutrons are optional to show in a basic Bohr - model). Then draw two conce…
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6. what is the volume of the liquid in each of the following graduated …
A. 2.4 mL B. 34 mL C. 16 mL
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elena makes the table below to determine the number of atoms of each el…
She should not have multiplied the sulfur atoms by the subscript 4.
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draw the orbital diagram for each of the following elements. oxygen chl…
Oxygen orbital diagram: 1s: $\uparrow\downarrow$ 2s: $\uparrow\downarrow$ 2p: $\uparrow\downarrow$ $\uparrow$ $\uparrow$ Chlorine orbital diagram: 1s: $\uparrow\downarrow$ 2s: $\u…
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10. circle the letter of each sentence that correctly describes atoms. …
A. Most of the mass of an atom is due to its protons and neutrons. B. Atoms have no overall electrical charge.
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which statement correctly describes why a compound is a pure substance?…
A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means.
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6. what is the volume of the liquid in each of the following graduated …
A. 2.6 mL B. 34 mL C. 15 mL
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directions: fill in the blank with the correct word from the list at th…
5. Isotopes 6. Electrons 7. mass 8. number 9. Metals 10. reactive
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chemistry 11 - unit 3: mole concept for all questions, show your work, …
1. The molar mass of Nickel (III) sulfate is $405.59\space g/mol$. 2. The percent - composition by mass of hydrogen in $(NH_4)_3PO_4$ is approximately $8.13\%$. 3. The mass of $8.…
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which of the following elements has the following shorthand electron co…
First question: A. Cobalt Second question: Option 4. [Kr] $5s^{2}4d^{10}5p^{3}$
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multiple choice record your answers on the answer sheet provided by you…
1. B. There are about 1,000 elements found in nature. 2. C. compound 3. D. 99.8% 4. A. flammability 5. B. aluminum 6. B. sodium, potassium, and magnesium 7. D. Matter is neither c…
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2. why is diagram #2 considered an ion? in your answer, include whether…
2. Diagram #2 is considered an ion if it has a different number of electrons from protons. If it has more protons than electrons, it is a positive ion; if it has more electrons th…
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how many dots would be shown in the lewis dot diagram for nitrogen? 7 5…
1. B. 5 2. B. The number and arrangement of valence electrons around an atom.
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refer to the orbital diagram image below. choose the best option that m…
An atom with 6 valence electrons: C Violates the rules of filling electrons in orbitals: A Violates the rules of energy levels: D
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which letter order gives the color - coded regions of s, p, d, and f in…
W, Y, X, Z