Answer:
The nuclei of most atoms also contain neutrons . The masses of subatomic particles are very tiny. ... Since the nucleus contains protons and neutrons, most of the mass of an atom is concentrated in its nucleus. Protons and electrons have electrical charges that are equal and opposite.
Answer: Fire requires oxygen to burn. Water "smothers" fire and prevents it from acquiring more oxygen. Fire also requires heat, which cool water may prevent/remove.
D, <span>Monotonic gases, which have no inter molecular attractions are most suited as ideal gases </span><span />
B. 1 mole of beryllium, 2 moles of oxygen, 2 moles of hydrogen
