7.2

Question 1

Atoms

Answer 1

very small particle that makes up all things. Atoms have the same properties as the objects they make up.

Question 2

Atomic number

Answer 2

number of protons in the nucleus of an atom. The atomic number determines which element an atom is.

Question 3

Chemical symbol

Answer 3

e standard way that scientists write the names of the elements, using either a capital letter or a capital followed by a lowercase letter. For example, carbon is C and copper is Cu.