Which of the following represents a polar covalent bond A. O-O
B. Ca-O
C. H-C1
D. H-S

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true