Choose all that apply. Protons: orbit the nucleus have a positive charge have a negative charge have no charge are found in the nucleus

the only liquid elements at standard temperature and pressure are bromine (br) and mercury (hg). although, elements caesium (cs), rubidium (rb), francium (fr) and gallium (ga) become liquid at or just above room temperature.

explanation:

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

distance, luminosity, brightness, radius, chemical composition, and temperature

i do not get it   at all