Answers26-27 WHS-Chemistry-1stSixWeeksAtomic Numbers and Electron Configurations

Ionic Bonding Answers

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1
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Which element has 32 protons in its nucleus?

A
phosphorus
B
cobalt
C
germanium
D
sulfur
2
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Which best explains why ionization energy tends to decrease from the top to the bottom of a group?

A
The number of orbitals decreases.
B
The number of neutrons decreases.
C
Electrons get closer to the nucleus.
D
Electrons get farther from the nucleus.
3

Which set of numbers gives the correct possible values of l for n = 2?

A
0
B
0, 1
C
0, 1, 2
D
0, 1, 2, 3
4

Air is made up of different gases, such as oxygen, nitrogen, and carbon dioxide. Which statement best describes these three components of air?

A
Oxygen, nitrogen, and carbon dioxide are all classified as pure substances.
B
Oxygen, nitrogen, and carbon dioxide cannot react with another substance.
C
Oxygen, nitrogen, and carbon dioxide are chemically bonded to one another.
D
Oxygen, nitrogen, and carbon dioxide can be classified as elements.
5

A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?

A
V
B
Na
C
Mg
D
Se
6

What is the atomic number of zirconium?

A
39
B
40
C
41
D
42
7

Which element is classified as an alkali metal?

A
Rb
B
Sr
C
Zr
D
Cl
8

Which characteristic is given by the angular momentum quantum number?

A
orbital size
B
orbital mass
C
orbital shape
D
orbital orientation
9

Which substance is a mixture?

A
table salt
B
gasoline
C
aluminum
D
carbon dioxide
10

How many valence electrons does aluminum (Al) have available for bonding?

A
1
B
2
C
3
D
4
11

When electrons are removed from the outermost shell of a calcium atom, the atom becomes

A
an anion that has a larger radius than the atom.
B
an anion that has a smaller radius than the atom.
C
a cation that has a larger radius than the atom.
D
a cation that has a smaller radius than the atom.
12

In which orbitals would the valence electrons for selenium (Se) be placed?

A
s orbital and f orbital
B
s orbital only
C
s orbital and p orbital
D
d orbital only
13

Hydrogen has three isotopes 1H, 2H, and 3H. What is the difference between these three isotopes?

A
The number of protons ranges from 1 to 3.
B
The number of electrons ranges from 1 to 3.
C
The number of neutrons ranges from 0 to 2.
D
The number of protons ranges from 0 to 2.
14

Which of the following symbols would be included in the noble gas notation for an element that had valence electrons in the 5s subshell?

A
Ar
B
Kr
C
Xe
D
Rn
15

Which statement best describes how electrons fill orbitals in the periodic table?

A
Electrons fill orbitals in order of their increasing energy from left to right.
B
Electrons fill orbitals in order of their increasing energy from right to left.
C
Elements fill orbitals in order of increasing energy from top to bottom in each group.
D
Elements fill orbitals in order of increasing energy from bottom to top in each group.
16

The diagram below shows some subatomic particles.Which of these statements best identifies the particle that is labeled with an X?

Question illustration
A
It is either a nucleus or a proton.
B
It is either a proton or a neutron.
C
It is either a neutron or an electron.
D
It is either an electron or a nucleus.
17

Which pure substance can be classified as an element?

A
H2
B
NO3
C
NaCl
D
H2SO4
18

Which element is the most reactive?

A
sodium
B
nickel
C
carbon
D
oxygen
19

Which element has the largest atomic radius?

A
As
B
N
C
P
D
Sb
20

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water?

A
boiling
B
freezing
C
chromatography
D
sorting

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