Fluorine is a reactive nonmetal in the Halogen group. What other elements below are also likely to be reactive like fluorine? a Chlorine and Neon
b Bromine and Xenon
c Lithium and Argon
d Chlorine and Bromine

There are 6.022 x 10^23 atoms of hg in 1 mole of hg. the number of atoms in 4.5 moles of hg can be found by multiplying 4.5 by 6.022 x 10^23 a. 2.7 x 10^24 b. 27 x 10^23 c. 2.71 x10^24 d. 27.099 x 10^23

Evaluate this exponential expression,8. (2 + 3)2 – 42

Put these processes of the water cycle in the correct order, starting at the point where the water is in the lake: 1. water evaporates into the atmosphere 2. rain, snow, or other precipitation falls 3. water collects into larger bodies of water 4. water vapor condenses into liquid water