3. Which best describes the definition for the atomic mass of an element? A. It is a ratio based on the mass of the carbon-12 atom.

B. It is the sum of the protons. And neutrons in one atom of the element.

C. It is twice the number of protons in one atom of the element.

D. It is a weighted average of the masses of an element’s isotopes.

What is the standard unit of measure for acceleration?

Which statements are true concerning mineral formation? check all that apply. the slower the cooling, the larger the crystals. the faster the cooling, the smaller the crystals. crystals formed from magma are smaller than crystals formed from lava. minerals can only form in solutions when the solution is heated deep underground. when a solution cools, elements and compounds leave the solution and crystallize as minerals. minerals formed from hot water solutions can form narrow channels in the surrounding rock.

Complete each row of the table below by filling in the missing prefix or missing exponent.