Chapter 4 Quiz

A  80

B  45

C  79

D  35

E  none of these.

A  none of these.

B  He

C  H

D  C

E  Be

A  An atom is the smallest identifiable unit of an element.

B  Atoms are responsible for the sensation of smell.

C  All of these statements are true.

D  Atoms are the basic building block of nature.

E  Atoms compose all matter.

A  Cations always have the same number of protons as electrons.

B  Anions are formed when an atom gains electrons.

C  Cations are positive ions and anions are negative ions.

D  All statements are correct.

E  Cations are formed when an atom loses electrons.

A    

B  must have exactly 18 electrons.

C  none of these

D  contains exactly 18 neutrons.

E  has 34 protons.

F  is an isotope of sodium.

A  The atomic mass would be more than 18.

B  The atomic mass would be 17.

C  The atomic mass would be less than 16.

D  The atomic mass would be 18.

A  20 protons, 17 neutrons

B  37 protons, 17 neutrons

C  none of these

D  17 protons, 20 neutrons

E  17 protons, 37 neutrons

A  manganese, Mn

B  calcium, Ca

C  potassium, P

D  gold, Au

E  chromium, Cr

A  Positive-positive or negative-negative charges repel each other.

B  All of these statements are true

C  Electrical charge is a fundamental property of protons and electrons.

D  Positive and negative electrical charges attract each other.

E  Positive and negative charges cancel each other so that a proton and electron, when paired, are charge neutral.

A  All of these statements are consistent.

B  Most of the volume of the atom is empty space occupied by tiny, negatively charged electrons.

C  Electrical charge is a fundamental property of protons and electrons.

D  Most of the atom’s mass and all of its positive charge is contained in a small core called the nucleus.

E  There are as many electrons outside the nucleus as there are protons inside the nucleus in a neutral atom.

A  Atoms combine in simple, whole-number ratios to form compounds.

B  Each element is composed of tiny indestructible particles called atoms.

C  All atoms of a given element have the same mass and other properties that distinguish them from the atoms of other elements.

D  Most of the atom’s mass and all of its positive charge is contained in a small core called the nucleus.

E  All of these are part of the atomic theory.

A  none of these

B  proposed the modern Atomic Theory

C  ancient Greek philosopher who proposed that matter was continuous

D  created the modern periodic table

E  discovered the existence of electrons