Atomic Structure

What is the atomic number?

• the number of protons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of neutrons in the nucleus

• the number of protons in the energy levels

Tags

NGSS.MS-PS1-1

What is the mass number?

• the number of protons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of neutrons in the nucleus

• the number of protons and electrons in the atom

Tags

NGSS.HS-PS1-8

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 does the C represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

Tags

NGSS.MS-PS1-1

How is the number of neutrons in the nucleus of an atom calculated?

• Add the number of e- and p+ together
• Subtract the number of e- from p+
• Subtract the number of p+ from the mass number
• Add the mass number to the number of e-

Tags

NGSS.MS-PS1-1

What subatomic particles would you find in the nucleus of an atom?

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

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

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

• 12 neutrons
• 12 electrons
• 12 protons
• 24 protons and neutrons

Tags

NGSS.MS-PS1-1

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20

• 10

• 35

• 25

Tags

NGSS.MS-PS1-1