C3T3 Isotope

___ are atoms of the same element that have different masses (neutrons)

isotopes are atoms of the same element that have different ___( or neutrons)

isotopes are atoms of the same element that have different masses because of different ___

isotopes are atoms of the same ___ that have different masses (neutrons)

___ number is the sum of proton number and neutron number

mass number is the sum of ___ number and neutron number

mass number is the sum of proton number and ___ number

nucleus of certain isotopes is unstable, and tend to break apart naturally—this kind of nucleus is ____

Isotopes are atoms of the _____element that have ____ mass.

• same; same
• same; different
• different; different
• different; same

Isotopes of an element (must) have the same number of ___

• proton
• neutron
• electron
• more than one correct answer