Isotope Review

Which of these determines the identity of an atom?

• proton

• neutron

• valence electron

• protons and neutrons

How would you write the isotope name from this nuclide symbol?

• Sodium-23

• Sodium-11

• Sodium-12

• Sodium-22

Tags

NGSS.HS-PS1-8

How many neutrons are in the isotope of sulfur,³⁶S?

• 16

• 20

• 24

• 26

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

How many neutrons are in the following atom?

• 47

• 61

• 108

• 155

Tags

NGSS.MS-PS1-1

What isotope is shown here? (Red = protons, gray = neutrons, blue = electrons)

• Beryllium-5

• Beryllium-9

• Boron-4

• Boron-9

Tags

NGSS.HS-PS1-8

An atom is electrically neutral when

• protons and neutrons are the same
• protons and electrons are the same
• neutrons and electrons are the same

What is the mass number of this atom?

• 1
• 3
• 4
• 7

Tags

NGSS.MS-PS1-1

What is a mass number?

• The average atomic mass
• the number of protons and neutrons in the nucleus
• the number of protons in the nucleus
• the number of protons and electrons in the nucleus

What is the correct hyphen notation name for the isotope with 19 electrons and 21 neutrons?

• Potassium-40

• Scandium-19

• Potassium-21

• Scandium-40