B is correct. Molecules move faster when they are hotter because they have more energy. You can notice this change with your naked eye. Molecules in solids don't move. They have barely any energy. Hope this helps! ;)
<span>pb(no3)2 + 2 nacl → pbcl2 + 2nano3</span>
The metalloids are mostly concentrated in groups 14, 15, and 16. (Some simpler charts will show them as 4A, 5A, and 6A - take a look at the top of the periodic table your class uses to double-check).
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There are 54 neutrons in molybdenum -96
C) a fundamental force would be gravity
