Download Which of the following statements correctly describes the

1
Created by Boundless
Which of the following statements correctly describes the relative masses of the
three subatomic particles?
A
Neutrons and electrons weigh the same, protons weigh
much less.
B
Protons and neutrons weigh the same, electrons weigh
much less.
C
Protons, neutrons and electrons all weight the same.
D
Protons and electrons weigh the same, neutrons weigh
much less.
2
Created by Boundless
Which of the following statements correctly describes the relative charges of the
three subatomic particles?
A
Electrons are positive, protons are neutral, neutrons are
negative.
B
Protons and neutrons have a charge of +1, while electrons
have a much smaller charge.
C
Protons are positive, neutrons are neutral, electrons are
negative.
D
Neutrons are positive, electrons are neutral, protons are
negative.
3
Created by Boundless
Which of the following statements accurately describes the locations of the three
subatomic particles that make up an atom?
A
The protons, neutrons and electrons are all in the nucleus.
B
The neutrons and electrons are in the nucleus, while the
protons orbit the nucleus.
C
The protons and electrons are in the nucleus, while the
neutrons orbit the nucleus.
D
The protons and neutrons are in the nucleus, while the
electrons orbit the nucleus.
4
Created by Boundless
If an atom has a mass number of 18, what can be said about the number of
protons and neutrons it contains?
A
It has 8 protons and 10 neutrons.
B
It has 9 protons and 9 neutrons.
C
It cannot be determined from the information given.
D
It has 10 protons and 8 neutrons.
5
Created by Boundless
If an atom has 8 protons, what is its atomic number?
6
A
It depends on the number of electrons in the atom.
B
It depends on the number of neutrons in the atom.
C
16
D
8
Created by Boundless
Which of the following statements concerning isotopes is true?
A
Isotopes are atoms of the same element that have different
atomic masses.
B
Isotopes are atoms of different elements that have different
atomic masses
C
Isotopes are atoms of different elements that have the
same atomic mass.
D
Isotopes are atoms of the same element that have the
exact same atomic mass.
7
Created by Boundless
Which of the following measurements used in radiometric dating can be used to
determine the age of fossils?
A
The increase in the amount of an unstable radioisotope
according to its known half-life
B
The current half-life of a stable radioisotope in the sample
C
The amount of a radioisotope leached into surrounding
environments according to its known half-life
D
The decrease in the amount of an unstable radioisotope
according to its known half-life
8
Created by Boundless
Which of the following electron configurations fulfills the octet rule?
A
The valence shell has one electron
B
The valence shell is half filled
C
The valence shell is completely filled
D
9
The valence shell is one less than filled
Created by Boundless
Potassium has an atomic number of 19. What is its electron configuration
according to the Bohr Model?
A
Shells 1 and 2 are full, while shell 3 has three electrons.
B
Shells 1, 2, 3, and 4 are full, while shell 5 has one electron
C
Shells 1, 2, and 3 are full, while shell 4 has one electron.
D
Shells 1 and 2 are full, while shell 3 has one electron.
10
Created by Boundless
Which of the following happens during a reaction?
A
Chemical bonds are broken and/or formed between atoms.
B
Covalent bond are formed but not broken between atoms.
C
Ionic bonds are broken and/or formed between atoms.
D
Ionic bonds are formed but not broken between atoms.
11
Created by Boundless
Which of the following is true of compounds?
A
Compounds are always made from the same kinds of
elements.
B
Compounds are always human-made
C
Compounds have atoms of more than one type of element.
D
Compounds have double bonds between all of the atoms.
12
Created by Boundless
Describe the shape and quantity of the 2s and 2p orbitals.
A
There are three spherical p orbitals and one dumbellshaped s orbital.
B
There is one spherical s orbital and three dumbell-shaped p
orbitals.
C
There is one spherical p orbital and three dumbell-shaped s
orbitals.
D
There are three spherical s orbitals and one dumbellshaped p orbital.
13
Created by Boundless
Which of the following statements is true?
A
The Bohr model of the atom describes electrons as
probability density wave functions
B
The Bohr model of the atom describes the location of the
atoms in the periodic table
C
The quantum mechanical model of the atom describes
electrons as probability density wave functions
D
The quantum mechanical model of the atom describes
electrons as particles in defined orbits