Atomic Number and Mass

What is atomic number?

• proton number

• electron number

What is atomic mass?

• nucleon number

• neutron 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

What is neutron number?

• the number of neutrons in the nucleus of an atom, equal to the mass number plus the atomic number of the atom

• the number of neutrons in the nucleus of an atom, equal to the mass number minus the atomic number of the atom

Which element has a mass number of 12 and contains 6 neutrons?

• Gallium

• Copper

• Carbon

• Sodium

ALL atoms of the same element have:

• same number of proton

• same number of nucleon

• different number of neutron

• different number of electron

Elements that have _____________ are in the same group

• physical properties

• chemical properties

Please choose the correct answer of the Periodic Table Trends.

• atomic mass increase across the period.

• atomic decrease down the group

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2