Which statement best describes how antibiotics are used? A. Antibiotics are added to the public water supply to prevent people
from getting sick.
B. Antibiotics are used to kill animals that commonly spread
diseases to people.
O C. Antibiotics are given to cure infections caused by bacteria or other
microorganisms.
D. Antibiotics are given to help treat infections caused by viruses.

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

Identify the missing numbers below to show the result of multiplying the numbers (1.6 × 10-19)(5.0 × 106) = c × 10d

Particles vibrate in a rigid structure and do not move relative to their neighbors.