Which of the following sequences of elements with all have four valance electrons B, si, as, te

C si, ge, sn

O s, se, te,

ga, ge, as, se

How manyatoms of mercury are in 1.4214e+1 ml sample

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color