Atoms. Ions and isotopes

What is the meaning of atomic number?

• proton number

• electron number

The fluorine atom has an atomic number of

• 19

• 9

Tags

NGSS.MS-PS1-1

What is the mass number and atomic number ?

• Mass number = 7, atomic number = 14

• Mass number = 14, atomic number = 7

Tags

NGSS.MS-PS1-1

How many neutrons are there in one atom of magnesium?

• 12

• 6

• 24

Tags

NGSS.MS-PS1-1

ALL atoms of the same element have:

• same number of proton

• same number of nucleon

• different number of neutron

• different number of electron

Tags

NGSS.MS-PS1-1

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

• 6

• 10

• 4

• 8

Tags

NGSS.MS-PS1-1

Isotopes have different numbers of

• protons

• neutrons

• electron

• properties

If an atom has 10 electrons, how many protons does it have?

• 0

• 1

• 10

• 5

Tags

NGSS.MS-PS1-1

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

Tags

NGSS.MS-PS1-1

Negative ions are called

• Cations
• Electrons
• Anions
• Neutrons