10A-Radioactivity

What is the mass number of this isotope?

• 131

• 53

• 184

• 78

Tags

NGSS.HS-PS1-8

What is the atomic number of this isotope?

• 131

• 53

• 184

• 78

Tags

NGSS.HS-PS1-8

How many protons does this isotope have?

• 131

• 53

• 184

• 78

How many neutrons does this isotope have?

• 131

• 53

• 184

• 78

Tags

NGSS.HS-PS1-8

An element with a nucleon number of 11 and a proton number of 5 has how many neutrons?

• 11

• 5

• 6

• 16

How many nucleons are in a nucleus of ?

• 19

• 20

• 39

• 58

Tags

NGSS.HS-PS1-8

This number determines what element you have. It determines the identity of the element.

• electron number

• proton number

• neutron number

• nucleon number

An isotope of an element has the same number of _________, but a different number of _________.

• Protons, electrons

• Protons, neutrons

• Electrons, neutrons

• Neutrons, protons

Tags

NGSS.MS-PS1-1

Which particles make up the nucleus of an atom?

• protons and neutrons
• electrons and protons
• electrons, protons, and neutrons
• electrons and neutrons

Tags

NGSS.HS-PS1-8

What makes something radioactive?

• elements with an atomic number above 81

• an unstable nucleus

• contaminated sewage

• high number of electrons