Question

1. which of these elements are nonmetals? (a) bromine, br (b) carbon, c (c) boron, b (d) thallium, tl (e) phosphorus, p (f) aluminum, al

Explanation:

Bromine is a halogen non - metal. Carbon is a non - metal in group 14. Boron is a metalloid. Thallium is a metal in group 13. Phosphorus is a non - metal in group 15. Aluminum is a metal in group 13.

Answer:

A. bromine, Br
B. carbon, C
E. phosphorus, P