Chemistry: Atoms, Ions, and Isotopes

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

• Atomic number

• Atomic mass

• Mass number

• Isotope number

What does the atomic number identify?

• The number of neutrons.

• The number of protons.

• The number of protons + neutrons.

• The number of electrons.

How many neutrons are in the following atom?

• 47

• 61

• 108

• 155

Tags

NGSS.MS-PS1-1

How many protons are in the following atom?

• 82

• 125

• 207

• 189

Tags

NGSS.MS-PS1-1

How many neutrons are in the isotope Carbon-14?

• 6

• 8

• 12

• 14

Tags

NGSS.MS-PS1-1

An ion with a positive charge has __________.

• the same number of protons and electrons.

• lost a proton.

• lost an electron.

• gained an electron.

Tags

NGSS.MS-PS1-1

How many electrons does the following ion have?

• 10

• 12

• 14

• 22

Tags

NGSS.MS-PS1-1

How many electrons does the following ion have?

• 3

• 7

• 10

• 14

Tags

NGSS.MS-PS1-1

Which of the following describes a positive ion?

• 10 protons, 12 electrons

• 12 protons, 10 electrons

• 12 protons, 12 electrons

Tags

NGSS.MS-PS1-1

Atoms of the same element with a different number of neutrons are called _________.

• elements

• isotopes

• ions

• neutral

Tags

NGSS.HS-PS1-8