Atomic Structure and Isotopes

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

What is the mass number?

• 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 nucleus?

• 1
• 3
• 4
• 7

Tags

NGSS.HS-PS1-8

What is the mass number of this nucleus?

• 1
• 3
• 4
• 7

Tags

NGSS.HS-PS1-8

Because atoms are neutral, the number of protons is always _______ the number of electrons

• greater than
• less than
• equal to
• proportional to

Tags

NGSS.MS-PS1-1

A fluorine atom has 9 protons and 10 neutrons. What is the atomic number of fluorine?

• 9
• 10
• 19
• 1

Tags

NGSS.MS-PS1-1

A phosphorus atom has 15 protons and 16 neutrons. What is the mass number?

• 15
• 16
• 31
• 1

Tags

NGSS.MS-PS1-1

How many neutrons in C-14?

• 6
• 7
• 14
• 8

Tags

NGSS.HS-PS1-8

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Tags

NGSS.HS-PS1-8

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

Tags

NGSS.HS-PS1-8