It's 2) a positively-charged nucleus is surrounded by mostly empty space (aka Rutherford's Model).
Most of the atom's mass is inside the nucleus (which contains protons [+] and neutrons [0 charge]), while the electrons [-] "float" around the nucleus like clouds. This is why it's said that the atom is 'mostly empty space'.
P is the chemical symbol for phosphorus.
Cl is the chemical symbol for chloride, and there are three of them - the prefix for three is tri-.
C.
It is the only thing that is making a new thing, and not breaking or taking apart something that is already there.
It describes how, when particles/mc/elements react, despite forming different substances the mass is neither created nor destroyed but only converted.
Answer:
O
Explanation:
O is in the red which says nonmetal
