Energy & Matter in Chemical Change

Question 1

Isotope Notation

Answer 1

A A= mass
X X=symbol
Z Z=protons/electrons

Eg.
64 # p+= 29
Cu # e- = 29
29 # n 0 = 64-29= 35

Question 2

Isotopes

Answer 2

-Has the same number of protons and electrons but different number of neutrons