Answer:
Helium is the second element on the periodic table. It is located in period 1 and group 18 or 8A on the righthand side of the table. This group contains the noble gases, which are the most chemically inert elements on the periodic table. Each He atom has two protons and usually two neutrons and two electrons.
Explanation:
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760.0 mmHg(V)=600.0mmHg(240.0mL)
600(240)/760=189mL
When a solute is completely dissolved in a solvent, a solution is formed.
i can think of 3 subatomic particles found in a nucleus protons, neutrons, and electrons
