Chapter 4 Quiz

A  79

B  35

C  none of these.

D  80

E  45

A  none of these.

B  He

C  H

D  C

E  Be

A  Atoms compose all matter.

B  Atoms are the basic building block of nature.

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

D  All of these statements are true.

E  Atoms are responsible for the sensation of smell.

A  Cations are positive ions and anions are negative ions.

B  Cations are formed when an atom loses electrons.

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

D  All statements are correct.

E  Anions are formed when an atom gains electrons.

A  must have exactly 18 electrons.

B  is an isotope of sodium.

C    

D  has 34 protons.

E  none of these

F  contains exactly 18 neutrons.

A  The atomic mass would be 17.

B  The atomic mass would be less than 16.

C  The atomic mass would be 18.

D  The atomic mass would be more than 18.

A  none of these

B  20 protons, 17 neutrons

C  17 protons, 20 neutrons

D  37 protons, 17 neutrons

E  17 protons, 37 neutrons

A  manganese, Mn

B  chromium, Cr

C  gold, Au

D  calcium, Ca

E  potassium, P

A  All of these statements are true

B  Positive and negative electrical charges attract each other.

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

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

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

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

B  All of these statements are consistent.

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

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

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

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

D  All of these are part of the atomic theory.

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

A  created the modern periodic table

B  ancient Greek philosopher who proposed that matter was continuous

C  none of these

D  discovered the existence of electrons

E  proposed the modern Atomic Theory