A chemical change because a temperature change occurred, the solid disappeared and a gas was produces
Explanation:
Magnesium reacts with hydrochloric acid releasing energy, and leading to the formation of magnesium chloride and hydrogen gas. This is represented by the equation below:
chemical change because a temperature change occurred, a solid disappeared, and a gas was produced
Explanation:
In a chemical change there is a change in the chemical property of the reactant such that a new product is formed such as rusting of iron to form iron oxide. In a physical change there is phase change of the substance such as melting of ice.
Mg is a metal that combines with the acid HCl to form the salt magnesium chloride, MgCl₂ and hydrogen gas, H₂. The chemical property of salts and gases are completely different from that of metal and acids.
By going from the top to the bottom of a group, the atomic number increases. That would mean that:
The number of orbitals increases, as there are more electrons.
A higher atomic number implies an increasing number of neutrons.
As there are more electrons, they get farther from the nucleus. The farther an electron is from the nucleus, the easier it is for the electron to be removed from the atom.
