Hot water deep within Earth can minerals and transport them to the surface where they can cool and form crystals.

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o