Answer:
a) Hydrogen and Fluorine
b) Lithium and Oxygen
c) Potassium and Phosphorus
d) Nickel and Oxygen
e) Mercury and Chlorine
Explanation:
The capital letters in the compounds represent a single element, while some elements have one capital letter and one small letter after it.
a) H & F
b) Li & O
c) K & P
d) Ni & O
e) Hg & Cl
