Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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how many electrons does this atom have? 1s²2s²2p⁶3s²3p¹ 20 10 13 18
13
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how many protons does tin have? tin 50 sn 118.71
\(50\)
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the electron configuration for iodine is below, what is the highest occ…
6
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a chemistry graduate student is very skilled at analyzing atomic emissi…
Copper
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the electron configurations of two unknown atoms are shown. based on th…
17
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how many unpaired electrons does phosphorous have? 1s² 2s² 2p⁶ 3s² 3p³ …
3
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what atom is this? sulfur, z = 16 chlorine, z = 17 neon, z = 10 nitroge…
Sulfur, \(z = 16\)
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matching activity carcinogens a. tobacco products that heat tobacco or …
carcinogens - O, chronic bronchitis - N, chronic obstructive pulmonary disease (COPD) - H, e - liquid - L, emphysema - E, leukoplakia - K, nicotine - D, popcorn lung - F, secondha…
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the electron configurations of two unknown atoms are shown. based on th…
Atom X = 1; Atom Y = 7 (the first option)
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each arrow shows an electron moving from one energy level to another. w…
A. B and C B. only A C. A and D D. only C The correct answer is A and C. But since there is no option with A and C, re - checking the problem. Wait, looking at the options provide…
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multiple - choice question when energy is stored, we call it _. chemica…
potential energy
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how many valence electrons does this atom have? 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²…
5
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the table shows the number of each of the three subatomic particles for…
1 and 3
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complete and balance the following redox equation. what is the coeffici…
\(2\)
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complete the sentence with the word that best fits the overall meaning …
prevalent
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complete and balance the following redox equation. when properly balanc…
\(3\) ### Question 2
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question 5 the oxidation number of mn in kmno₄ is a 7+ b 7- c 8+ d 5+
A. \(7+\)
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the oxidation number of n in nano₃ is a 2+ b 4+ c 6+ d 5+ e 3+ f 3- que…
For \(NaNO_3\), D. \(5+\) For \(ClO_3^{-}\), B. \(+5,-2\)
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among mental health professionals, the following clinical term is used …
Mental disorder
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which of the following is a metal? sulfur hydrogen calcium argen
Calcium
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which property of an atom or element will determine how it reacts with …
valence (outermost) electrons
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which of the following is a nonmetal? gallium bromine yttrium vanadium
Bromine
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which of these elements has the highest ionization energy? francium (fr…
Lithium (Li)
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which element has the greater ionization energy? lead (pb) germanium (g…
Silicon (Si)
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which element has the same properties as phosphorus but has a larger ma…
Arsenic
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which of the following elements has the smallest atomic radius: li, c, …
F has the smallest atomic radius among Li, C, O, and F.
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what group on the periodic table contains the elements of the alkaline …
Group 2
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which of the following has the smallest atomic radius? radon, rn lodine…
Nitrogen, N
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which color on the image of the periodic table corresponds with the tra…
blue
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which of the following is a trait of the noble gases? they are all stab…
They chemically stable gases
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the atom with the largest atomic radius in group 18 is -
\(Rn\)
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which of the following statements best describes canadas current medica…
None of the options fully and accurately describe Canada's current medicare system in all aspects. For example: - The option about it being a scheme where salaried doctors provide…
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the atom with the largest atomic radius in period 4 (row 4) is k fe kr …
\(K\) (Potassium) has the largest atomic radius among the given elements in Period 4.
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place the following elements in order of decreasing atomic radius. cl, …
Ca, Mg, Al, Cl
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elements to the right of the zigzag line (staircase) are most likely me…
nonmetals
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what are the vertical columns on the periodic table called? protons val…
C. families
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the energy it takes to remove one electron from an atom electron affini…
Ionization Energy
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of the elements ca, be, ba, and sr, which has the largest atomic radius?
Ba
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which element has the greater ionization energy?magnesium (mg)aluminum …
Phosphorus (\(P\))
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which of the following would be elements that are found in the same per…
Sn and Rb
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what is the name of the family that is highlighted? halogen family alka…
Alkali Metal Family
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a student listed some information about calcium chloride (cacl₂) in the…
It releases energy when it reacts with water.
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which of the following is a property of acids? o bitter taste o slipper…
turns blue litmus paper red
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a solution with a ph of 3 is considered neutral weakly basic weakly aci…
strongly acidic
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which ion is characteristic of all acids in water? oh - (hydroxide ion)…
H + (hydrogen ion)
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which is the chemical formula for magnesium hydroxide? mg(oh) 2 mgoh mg…
\(Mg(OH)_2\) (the first option).
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a nuclear power facility harnesses energy via what energy process? nucl…
nuclear fission
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caroline and andrew were examining a brass statue. caroline told andrew…
All samples of the brass have Cu and Zn atoms in a single phase.
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deep in the core of the sun, 620 million metric tons of hydrogen nuclei…
The "missing mass" is transformed into energy in a fusion reaction.
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one kilogram of uranium can produce as much energy as 16,000 kilograms …
Uranium undergoes fission, and nuclear reactions give off more energy than chemical reactions.
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first read: comprehension identify the choice that best answers the que…
C. The fright they experience may create lasting bad memories.
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4. los electrones de valencia son importantes porque: a. se utilizan pa…
a. Se utilizan para la unión.
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mercury 0.14 vegetable oil 1.67 olive oil 1.97 gasoline 2.22 ethanol 2.…
Water has a higher specific heat capacity than most other chemicals.
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3. el primer nivel de energía puede contener un máximo de: a. 8 electro…
B. 2 electrones
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encierra en un círculo la mejor respuesta. 1. ¿qué modelo atómico muest…
c. Modelo de nube de electrones
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as opposed to freuds focus on sexuality, which neo-freudian focused on …
14. collective unconscious 15. archetypes
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close read: analyze the text identify the choice that best answers the …
C. to show how quickly the brain can determine a threat is not real
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read the sentence from an argumentative essay about chemical waste. the…
The chemical waste produced by factories is dangerous, and factory owners should be held accountable.
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the mass number tells you the number of______in an atom * protons + neu…
- First question: Protons + Neutrons - Second question: Electrons (in a neutral atom, atomic number = number of protons = number of electrons) - Third question: mass number - atom…
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first read: comprehension identify the choice that best answers the que…
C. The fright they experience may create lasting bad memories.
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in rutherfords gold foil experiment, most particles went straight throu…
- First question: the atom is mostly empty space - Second question: neutral - Third question: center of atom where mass lives
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9. when someone gets hurt playing sports, often times a cold pack is us…
1. T 2. F 3. F 4. T 5. T 6. T 7. T 8. F 9. F 10. T 11. T 12. T 13. F 14. F 15. F
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where are electrons found?*surrounding the nucleusin the protonsin the …
- Where are electrons found? A. Surrounding the nucleus - A neutron has a charge of: A. \(0\) - An electron has a charge of: C. \(-1\)
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a bohr model of a sulfur atom is shown below. how many electrons are in…
\(8\)
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how many protons are in boron?*boron5b10.811510.811116who was the first…
- First question: 5 - Second question: Democritus
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name this atom * electron proton neutron boron fluorine carbon lithium
Lithium
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what is an atom? * 2 points a family biology unit smallest particle of …
smallest particle of elements
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23. you have seen that a single water molecule can create a hydrogen bo…
4
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isotopes have the same number of protons but a different number of ____…
1. neutrons 2. repel 3. indivisible
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21. consider the water on the smooth surface you observed at the beginn…
A. high; B. the water forms a dome - like shape (indicating strong cohesive forces which are characteristic of high surface tension)
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a bohr model of a sodium atom is shown below. na how many electrons are…
1
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a bohr model of an oxygen atom is shown below. how many valence electro…
6
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18. consider a liquid that does not exhibit highly cohesive properties …
C. The liquid would likely not cling to itself in a continuous stream. D. The liquid would likely break apart and drip off the string.
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17. describe the role of cohesion and adhesion in the instance to the l…
A. Cohesion B. Adhesion
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14. describe hydrogen bonding within a container of water. the hydrogen…
The hydrogen of a water molecule is attracted to the oxygen of a different water molecule.
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13. identify the type of interaction that connects one water molecule t…
Hydrogen
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what element is the?
\(^{115}_{48}\text{Cd}\)
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9. complete the statement about the type of bond that connects each hyd…
polar covalent
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7. describe polarity in the water molecule. each hydrogen has a slightl…
A. positive, B. negative
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a massa atômica, u, corresponde a \\( \\frac { 1 } { 1 2 } \\) da massa…
\(3.27\times10^{-22}\text{ g}\) ### 2.2
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a. electrones de valencia b. modelo de bohr c. nube de electrones d. ni…
a. E. Núcleo b. I. Electrón c. G. Protón d. H. Neutrón e. C. Nube de electrones
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5. the sharing of electrons between hydrogen and oxygen within the cova…
A: closer to; type of atom: oxygen atom; type of charge: slightly negative charge
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how many neutrons are in oxygen-18
\(10\)
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periodic trends: the atomic radius of an atom increases down a column b…
There are more energy levels.
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which bohr model represents be?
The Bohr - model with \(4\ p\) (protons) and electrons arranged as \(2\) in the first shell and \(2\) in the second shell represents Be.
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atomic radius is ______. the distance from the center of the nucleus to…
the distance from the center of the nucleus to the outermost electron.
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15/20 nitrogen is a metal nonmetal metalloid
Nonmetal
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columns in the periodic table are called (two answers) select all corre…
families, groups
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which has the smaller atomic radius? rb or li?
Li
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34. identify the element with the electron configuration of $1s^{2}2s^{…
Sulfur (\(S\)) # 35.
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ionization energy is... a measure of the ability of an atom to attract …
how much energy it takes to remove an electron from an atom
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which has the greater electronegativity: n or c?
N
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rows in the periodic table are called periods groups columns families
periods
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elements in the same group will have the same number of energy levels c…
Valence Electrons
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which is the least electronegative? k or fr
\(Fr\)
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33. write the noble gas configuration for: a. lithium: b. argon: c. iro…
a. \([He]2s^{1}\) b. \([Ne]3s^{2}3p^{6}\) c. \([Ar]4s^{2}3d^{6}\) d. \([Xe]6s^{2}\)
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as you move down the periodic table atoms get bigger. this is because _…
The atoms have more energy levels.
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what element can be found in group 2 and period 5? xenon nitrogen phosp…
Strontium
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which element has the greatest electronegativity. nitrogen (n) or arsen…
Nitrogen (N) has greater electronegativity than Arsenic (As).
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previous 3 fill in the blank 1 point write the correct name for bacl₂. …
Barium chloride