4.03

Mass Number =

• Number of protons in an atom

• Number of protons + neutrons in an atom

• Number of electrons + protons in an atom

• The weighted average of all the naturally occurring isotopes of an element is called the

Tags

NGSS.MS-PS1-1

Atomic Number =

• Number of protons in an atom

• Number of protons + neutrons in an atom

• Number of electrons + protons in an atom

• The weighted average of all the naturally occurring isotopes of an element is called the

How many neutrons does Chlorine (Cl) with an atomic number of 17 and an atomic mass of 35.

• 17

• 18

• 19

Which element has 31 protons ?

• Gallium 
• Germanium
• Gadolinium
• Polonium

The atomic number of this pictured element is

• 28
• 58.6934
• Ni
• Nickel

Tags

NGSS.MS-PS1-1

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Tags

NGSS.MS-PS1-1

How many protons are in this isotope?

• 9

• 21

• 12

Tags

NGSS.MS-PS1-1

How many neutrons does a Calcium-48 isotope have?

• 16

• 20

• 28

• 12

Which of the following is the correct isotope for the following ion: Protons = 20; Neutrons = 21; Electrons = 18

• 
• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

How many neutrons are in lithium-7?

• 7
• 6.94
• 3
• 4