An atom has electrons in 3 energy levels. In the Bohr model of an atom, the number of core electrons is the number of electrons in energy levels...

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

the temperature of the gas, in k, not celsius.

6.4 cm (max) - 25 cm (min)

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >