chemistry

Which atom in the ground state has only one unpaired electron in its valence shell?



*A. Aluminum

B. Silicon

C. Phosphorus

D. Sulfur



The shape and bonding of a diatomic bromine molecule are best described as



A. Symmetrical and polar

*B. Symmetrical and nonpolar

C. Asymmetrical and polar

D. Asymmetrical and nonpolar



What is the oxidation number of sulfur in H2SO4?



A. 0

B. -2

*C. +6

D. +4