What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Tags

NGSS.HS-PS1-7

What is the mass number defined as?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

What is the atomic number of this atom?

• 1
• 3
• 4
• 7

Tags

NGSS.MS-PS1-1

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

What is the atomic number of Barium, Ba? (enlarge the periodic table)

• 20

• 38

• 56

• 88

Tags

NGSS.MS-PS1-1

Atoms of the same element which have a different number of neutrons are called _________________.

• ions

• isotopes

• quarks

• molecules

How many neutrons does C-14 contain? (tap to enlarge the image)

• 6

• 7

• 14

• 8

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

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

Tags

NGSS.MS-PS1-1