Which feature defines a neutral atom? (1 point) O a low level of reactivity
o the ability to change to another substance during a chemical reaction
O a full outer electron shell
o the number of electrons equal to the number of protons

please help i have a 26 in this class

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

i'm assuming that it's c.) red bank..