CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -Metals tend to readily lose electrons and form cations. Most of them react with atmospheric oxygen to form metal oxides. However, different metals have different reactivities towards oxygen (unreactive metals such as gold and platinum do not readily form oxides when exposed to air).

Detailed explanation-2: -Copper, lead and gold are all examples of unreactive metals. • When reactive metals are placed in acids they will react violently with lots of gas given off. Unreactive metals do not react with the acid.

Detailed explanation-3: -What Does Reactive Metal Mean? Reactive metal is a group of metal elements that can form a reaction with acids, water, mineral acids and powerful oxidizing acids. This group can be identified with the activity or reactivity series, which determines the most reactive metals from highest to lowest.

Detailed explanation-4: -In chemistry, reactivity is a measure of how readily a substance undergoes a chemical reaction. The reaction can involve the substance on its own or with other atoms or compounds, generally accompanied by a release of energy. The most reactive elements and compounds may ignite spontaneously or explosively.

Detailed explanation-5: -The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell.