Isotopes Notation

Atomic number=

• number of neutrons
• atomic mass
• protons
• electrons+protons

Mass Number is--

• the number of protons + neutrons
• the number of protons
• the number of electrons +protons +electrons
• the same as atomic number

How many protons does He have?

• 4
• 2
• 6
• 0

Tags

NGSS.MS-PS1-1

The top number in this isotope notation is

• the mass number
• the atomic number
• the atomic mass
• the neutron number

The bottom number in this isotope notation is

• the mass number
• the atomic number
• the atomic mass
• the neutron number

Which statement is true about this isotope of Fluorine?

• Contains 9 protons and 10 neutrons

• Contains 9 protons and a mass number of 10

• Mass number of 19 and contains 10 protons

• Mass number of 19 and contains 9 neutrons

Tags

NGSS.MS-PS1-1

If the nucleus of the atom contains 10 protons and 11 neutrons then its mass number is...

• 10

• 11

• 21

• 20

How many neutrons are in this isotope of chlorine?

• 17

• 36

• 19

• 18

Tags

NGSS.MS-PS1-1

How many neutrons are in this isotope of chlorine?

• 17

• 36

• 19

• 18

Tags

NGSS.MS-PS1-1

This isotope of gold contains...

• 79 protons

• Mass number of 79

• 79 neutrons

• Atomic number of 197

Tags

NGSS.MS-PS1-1