Which of the following statements is (are) true? For the false
statements, correct them.
a. Most of the known elements are metals.
b. Element 118 should be a nonmetal.
c. Hydrogen has mostly metallic properties.
d. A family of elements is also known as a period of
elements.
e. When an alkaline earth metal, A, reacts with a halogen, X,
the formula of the covalent compound formed should
be A₂