Question

Give an example of a combination reaction between two elements.

Answer 1

Hint : To answer this question, we first need to understand what are elements. An element is a pure substance made up entirely of atoms with the same number of protons in their atomic nuclei, as defined by chemistry. Chemical elements, unlike chemical compounds, cannot be broken down chemically into simpler molecules.

Complete Step By Step Answer:
Chemical reaction – A chemical reaction occurs when one or more compounds, known as reactants, are changed into one or more distinct substances, known as products. Chemical elements or compounds are examples of substances. The constituent atoms of the reactants are rearranged in a chemical reaction, resulting in the formation of various substances as products.
Combination reaction – A combination reaction (sometimes referred to as a synthesis reaction occurs when two or more elements or compounds (reactants) combine to generate a single chemical (product). A combination reaction is when two or more components are combined to form a single compound. To put it another way, when two or more elements or compounds react to generate a single compound, the chemical reaction is known as a combination reaction.
Examples –

{2Na{\text{ }} + {\text{ }}C{l_2}\; \to {\text{ }}2NaCl} \\\ {C{\text{ }} + {\text{ }}{O_2}{\text{ }} \to {\text{ }}C{O_2}} \\\ {2Mg{\text{ }} + {\text{ }}{O_2}\; \to {\text{ }}2MgO} \end{array}$$ So, we conclude that, A combination reaction occurs when two reactants combine to produce a single product. Oxygen and the halogens are extremely reactive elements that are prone to reacting with other elements. **Note :** Chemical process safety is concerned with preventing incidents and accidents during large-scale chemical and pharmaceutical manufacturing – specifically, the unintentional release of potentially hazardous materials and energy into the environment during a chemical reaction or as a result of a runaway reaction.