Review – Chemistry for CA 2
A
B
C
neutrons and electrons
protons and electrons
electrons and energy levels
D
protons and neutrons
A
B
C
D
neutrons
protons
electrons
the mass of the atom
Which of the following best describes an atom?
A protons and electrons grouped together in a random pattern
B protons and electrons grouped together in an alternating pattern
C a core of protons and neutrons surrounded by electrons
D a core of electrons and neutrons surrounded by protons
Which of the following is found farthest from the center of an atom?
A nucleus
B proton
C neutron
D electron
Most of the volume of an atom is occupied by:
A protons
B empty space
C a gas
D the nucleus
Where are protons found in an atom?
A inside electrons
B deep within the neutrons
C inside the nucleus
D covering the surface of electrons
Where are electrons found in an atom?
A inside protons
B deep within the neutrons
C orbiting the nucleus
D covering the surface of protons
An atom has 13 protons, 14 neutrons,
and 10 electrons. What is the charge
of this atom?
An ion of the element zinc has a
charge of +2. How many electrons
does a zinc ion have?
Isotopes like Carbon 12 or Carbon 14 are atoms of the
same element that contain different numbers of ____
in their nucleus.
A atoms
B electrons
C neutrons
D protons
Which of the following sets contains objects where
BOTH are found in the nucleus of an atom?
A electrons and protons
B protons and electrons
C neutrons and elements
D protons and neutrons
Most of the mass of an atom is occupied by:
A neutrons
B empty space
C a gas
D the nucleus
How many neutrons does an atom of uranium-238
have?
A chemist is identifying the elements
present in a sample of seawater. What
characteristic of an element’s atoms always
determines the element’s identity?
A The number of protons
B The number of neutrons
C The location of valence electrons
D The number of valence electrons
A student is studying calcium, a highly
reactive element that humans need for
strong bones. Which characteristic of
calcium is most closely related to its
chemical reactivity?
A The 20 protons in each atom of calcium
B The density of calcium, which is 1.54
g/cm3
C The atomic mass of calcium, which is
40.078 amu
D The 2 valence electrons in each atom of
calcium
An electrically neutral atom consists of 15
neutrons, 13 electrons, and a number of
protons. What is its mass number?
A 13
B 15
C 28
D 30
Based on the section of the periodic table shown
above, which statement BEST describes the element
carbon?
A
B
C
D
Carbon is a metal with an atomic number of 6.
Carbon is a metal with an atomic number of 12.
Carbon is a nonmetal with an atomic number of 6.
Carbon is a nonmetal with an atomic number of 12.
An atom consists of 7 neutrons, 7 electrons, and a
number of protons. The atom has a charge of -1.
What is its mass number?
A6
B7
C 13
D 14
Elements are arranged on the periodic table
according to:
A their atomic mass and properties
B their atomic number and properties
C their atomic mass and color
D their atomic number and color