Chemistry: Isotopes and Ions

What does the atomic number identify?

• The number of neutrons of a given atom.

• The number of protons of a given atom.

• The number of protons + neutrons of a given atom.

• The number of elections of a given atom.

The number of protons + neutrons in an atomic nucleus is referred to as what?

• Atomic number

• Mass number

• Isotope number

Atoms of the same element with differing number of electrons are called ________.

• elements

• isotopes

• ions

Which subatomic particle is used to identify the atom, as it never changes?

• Electron

• Proton

• Neutron

How many neutrons are in the nucleus of the following atom:

• 47

• 61

• 108

• 155

How many protons are in the following atom?

• 82

• 125

• 207

• 189

How many neutrons are in the isotope Carbon-14?

• 6

• 8

• 12

• 14

What is the complete symbol for a cobalt atom with a mass number of 60?

• A

• B

• C

• D

An ion with a positive charge __________.

• contains more electrons than the neutral atom

• contains less electrons than the neutral atom

• contains the same amount of electrons as the neutral atom

How many electrons does the following ion have?

• 10

• 12

• 14

• 22