4which quantity represents the number of protons in an atom?
(1) atomic number
(2) oxidization number
(3) number of neutrons
(4) number of valence electrons

What happens to isotopes that are unstable?

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.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?