In the modern quantum mechanical theory of the atom, electron movement is thought to be a

a. particle moving around a positively charged nucleus
b. "cloud" of negative charge in the centre
c. negatively charged particle at a certain energy level
d. "cloud" of negative charge occupying the space at a certain energy level.

Draw metallic bonding if two copper

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.

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?