Chapter 2 - Inside The Atom

Question 1

atoms of the same element that differ in the number of neutrons in the nucleus.

Answer 1

Isotope

Question 2

describes a nucleus that does not change spontaneously. The protons and neutrons in the nucleus are held together strongly.

Answer 2

Stable

Question 3

describes an atom in which the neutrons and protons in the nucleus are not held together strongly.

Answer 3

Unstable

Question 4

a radioactive form of an isotope.

Answer 4

Radioisotope