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21
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What is the element Ar classified as in the periodic table?

A
a halogen
B
a metal
C
a noble gas
D
a metalloid
22
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Which synthetic and natural polymers can be used to make thread or rope?

A
vulcanized rubber and nylon
B
starch and cellulose
C
vulcanized rubber and starch
D
nylon and cellulose
23

An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which statement describes the most likely result?

A
The energy released in the first move is greater than the energy absorbed in the second move.
B
The energy released in the first move equals the energy absorbed in the second move.
C
The energy absorbed in the first move is greater than the energy released in the second move.
D
The energy absorbed in the first move equals the energy released in the second move.
24

Which is true of transition metals when moving from left to right on the periodic table?

A
The cation radii become larger across the period.
B
Atomic radii increase slightly and then start to decrease.
C
The d sublevels are not filled across the period.
D
Atomic radii decrease slightly and then start to increase.
25

An element has five valence electrons available for bonding. This element is most likely which of these?

A
tellurium
B
tin
C
phosphorus
D
boron
26

Which statement is part of Dalton's atomic theory?

A
Chemical reactions can change atoms from one type to another.
B
Atoms can be divided into their subatomic particles.
C
Atoms are able to be seen with proper spectroscopy equipment.
D
Matter is composed of small particles called atoms.
28

Which compound contains both sigma and pi bonds?

A
cap h sub 2 CO
B
HBr
C
cap h sub 2 cap s
D
HCCl sub 3
29

Which statement explains how the bands in the crystal of a metal are like atomic orbitals?

A
They both have localized electrons that orbit specific atoms.
B
They both involve ionization of some atoms so bonding can occur.
C
They both allow electrons to move from lower energy levels to higher energy levels.
D
They both have localized electrons that move from atom to atom.
30

What is the true ratio of atoms in a molecule or formula unit called?

A
the percent composition
B
the molecular formula
C
the molar mass
D
the empirical formula
31

In which orbitals would the valence electrons for carbon cap c be placed?

A
s orbital and d orbitals
B
s orbital and p orbitals
C
s orbital only
D
p orbitals only
32

Which diagram shows electrons violating the Pauli exclusion principle?

A
Image with description Three adjacent boxes, each containing a single arrow pointing up.
B
Image with description Three adjacent boxes. The first two boxes each contain two arrows, one pointing up and one pointing down. The third box contains one arrow pointing up.
C
Image with description Three adjacent boxes, the first box containing two arrows, one pointing up and one pointing down, the second two boxes contain two arrows pointing upward.
D
Image with description Three adjacent boxes, each containing one arrow pointing up and one arrow pointing down.
33

Consider the word equation. calcium hydroxide plus hydrochloric acid rightarrow calcium chloride plus water Which is the corresponding formula equation?

A
Ca OH sub 2 s plus 2 HCl l rightarrow CaCl sub 2 times aq plus 2 cap h sub 2 cap o l
B
CaO times s plus cap h sub 2 cap o l rightarrow Ca OH sub 2 aq
C
CaCl sub 2 times l rightarrow Ca times s plus Cl sub 2 times g
D
NaOH times aq plus 2 HCl aq rightarrow NaCl times aq plus 2 cap h sub 2 cap o l
34

Which is a characteristic of nuclear fission?

A
releases small amounts of energy compared to fossil fuels
B
involves the splitting of an atom into two or more fragments
C
involves the collision of two nuclei
D
releases nonradioactive waste only
35

Kumar is producing the photoelectric effect by using red light. He wants to increase the energy of emitted electrons. Based on the research of Albert Einstein, what is the best way for him to do this?

A
Decrease the intensity of red light.
B
Increase the intensity of red light.
C
Use a different colored light that has a higher frequency.
D
Use a different colored light that has a lower frequency.
36

Which statement best explains why the atomic theory developed efficiently?

A
Scientists had used creativity and the scientific method in their investigations.
B
Scientists had used a philosophical viewpoint as a method of investigation.
C
Scientists ignored all previous knowledge about atoms.
D
Scientists rarely repeated experiments to make sure the results were correct.
37

Which is the formula for diarsenic pentoxide?

A
Ar sub 2 cap o sub 5
B
As sub 5 cap o sub 2
C
As sub 2 cap o sub 5
D
2 As 5 cap o
38

Which statement is true about crystal lattice energy?

A
It increases as the size of the ions increases.
B
It is the energy that ions absorb when they form a crystal.
C
It is a measure of the strength of the bonds between ions.
D
It increases as the charge on the ions decreases.
39

Based on the information that is given, which atom in the table has the highest mass?

A
1
B
2
C
3
D
4
40

In which region are most particles moving the fastest?

A
2
B
3
C
4
D
5
41

The process shown in the image can best be described as a

A
slow chemical reaction where light is being given off.
B
rapid chemical reaction where gas is released.
C
rapid chemical reaction where heat is suddenly released.
D
slow chemical reaction where the liquid changes color.

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