Hydrogen is grouped with the alkali metals because they are grouped based on their properties and behavior, and like the other elements in Group 1 (1A), it only has one valence.
Answer:
It's the third option.
Explanation:
In order for the chemical equation to be correctly it needs the same number of atoms of each element on both sides of the equal sign
Mass / volume = density
30.943g / 35ml = 0.88408571g/ml
Answer: J
Explanation: when a object hits something it has a equal and opposite reaction pushing it back
