When reading the periodic table, the atomic mass of magnesium is 24.31. What does this mean? A) Mg atoms have an average mass of 24.31 amu

B) All Mg atoms have a mass number of 24.

C) Mg has 24.31 protons and neutrons.

D) All Mg atoms have a mass of 24.31 amu.

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

What causes most sediment to wash or fall into a river

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