Week 1 Practice Quiz

Question 0

Which of the following are the largest in size?
A) An atom
B) A molecule
C) A proton
D) A neutron
E) An electron

Answer 0

B) A molecule

Question 1

The simplest chemical units of a matter are?
A) Atoms
B) Molecules
C) Protons
D) Neutrons
E) Electrons

Answer 1

A) Atoms

Question 2

The atomic number represents the number of?
A) Protons in an atom
B) Electrons in an ion
C) Neutrons in an atom
D) Protons and neutrons
E) Neutrons and electrons

Answer 2

A) Protons in an atom

Question 3

All atoms with the same atomic number are grouped into
A) Molecules
B) Cells
C) Compounds
D) Elements
E) Isotopes

Answer 3

D) Elements

Question 4

The mass number of an atom indicates the number of
A) Protons in the nucleus
B) Neutrons in the nucleus
C) Electrons in the outer shell
D) Protons and neutrons in the nucleus
E) Protons and electrons in an atom

Answer 4

D) Protons and neutrons in the nucleus

Question 5

Elements that have atoms with full outer shells of electrons
A) Will form many compounds
B) Will normally form anions
C) Will normally form cations
D) Frequently form hydrogen bonds
E) Are inert

Answer 5

E) Are inert

Question 6

Isotopes of an element differ in the number of 
A) Protons in the nucleus 
B) Electrons in the nucleus
C) Neutrons in the nucleus
D) Electron clouds
E) Electrons in energy shells

Answer 6

C) Neutrons in the nucleus

Question 7

If an isotope of oxygen has 8 protons, 10 neutrons and 8 electrons, it's mass number is
A) 26
B) 16
C) 18
D) 8
E) 12

Answer 7

C) 18

Question 8

Electrons have a \_\_\_\_\_\_ charge; protons have a \_\_\_\_\_\_\_\_ charge; and neutrons have a \_\_\_\_\_\_\_ charge.
A) Positive; negative; negative
B) Negative; positive; positive
C) Negative; positive; neutral
D) Negative; neutral; positive
E) Negative; neutral; neutral

Answer 8

C) Negative; positive; neutral

Question 9

The four elements making up about 96% of the body's mass are represented by the symbols
A) O, Ca, H, Na
B) O, C, H, N
C) O, C, He, Na
D) O, H, K, N
E) O, Ca, H, Ni

Answer 9

B) O, C, H, N

Question 10

An atom of one element is best distinguished from an atom of another element by the number of:
A) Neutrons in the nucleus
B) Electrons in the nucleus
C) Protons in the nucleus
D) Electrons orbiting the nucleus
E) Electrons it can lose when bonding

Answer 10

C) Protons in the nucleus

Question 11

Subatomic particles located around the nucleus of an atom are
A) Protons
B) Electrons
C) Neutrons
D) Neutrinos
E) Photons

Answer 11

B) Electrons

Question 12

A neutral atom contains:
A) More protons than electrons
B) More electrons than protons
C) The same number of electrons and protons
D) Only neutrons
E) None of the above

Answer 12

C) The same number of electrons and protons

Question 13

Electrons:
A) Comprise the majority of the mass of an atom
B) Are located in the nucleus of an atom
C) Have a positive charge of one
D) Are the subatomic particles most involved in bonding behaviour of atoms
E) Do not participate in the bonding of atoms

Answer 13

D) Are the subatomic particles most involved in bonding behaviour of atoms

Question 14

Which of the following best describes a proton?
A) One negative charge, no mass, found in orbitals
B) No charge, mass of one, found in nucleus
C) One positive charge, mass of one, found in nucleus
D) Subatomic particle with no electric charge
E) None of the above

Answer 14

C) One positive charge, mass of one, found in nucleus

Question 15

The mass number of an atom is the….
A) Number of protons in the atom
B) Number of neutrons in the atom
C) Number of protons and electrons in the atom
D) Number of electrons and neutrons in the atom
E) Number of neutrons and protons in the atom

Answer 15

E) Number of neutrons and protons in the atom

Question 16

An atom has an atomic number of 19 and a mass number of 39. This atom will have
A) 19 neutrons
B) 20 neutrons
C) 39 neutrons
D) 58 neutrons
E) 20 electrons

Answer 16

B) 20 neutrons

Question 17

An atom of chlorine has 17 protons and 18 neutrons. Which of the following statements is true?
A) Chlorine atoms have 18 electrons
B) Chlorine has a mass number of 35
C) Chlorine has an atomic number of 18
D) Chlorine has 35 electrons
E) Chlorine has an atomic number of 35

Answer 17

B) Chlorine has a mass number of 35

Question 18

Energy....
A) Has mass
B) Is the capacity to do work
C) Has weight
D) Takes up space
E) Cannot be stored

Answer 18

B) Is the capacity to do work

Question 19

Chemical energy….
A) Moves matter
B) Results from the position or movement of objects
C) Is a form of potential energy within chemical bonds
D) Comes from the sun
E) Is not important in physiological processes

Answer 19

C) Is a form of potential energy within chemical bonds