Question

Write the formula of three compounds which you know and name the elements in them​

Answer 1

Answer:

See below

Explanation:

Three compounds are:

1) $\mathrm {H_{2}SO{4}}$ [Sulfuric acid]

The elements in this compound are hydrogen (H) , Sulfur (S) and Oxygen (O).

2) $\mathrm {NaOH}$ [Sodium hydroxide]

The elements in this compound are Sodium (Na) , Oxygen (O) and Hydrogen (H).

3) $\mathrm {HCl}$ [Hydrochloric acid]

The elements are Hydrogen (H) and Chlorine (Cl).

Answer 2

Answer:

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Explanation:

Compound definition:

A compound is a chemical substance formed by two or more chemically bonded elements.

Three compounds:

Water is a compound with the formula $\sf H_2O$.

Two hydrogen atoms and one oxygen atom is present in one molecule of water.

Sodium chloride or table salt is a compound with the formula $\sf NaCl$.

One sodium atom and one chlorine atom is present in one molecule of sodium chloride.

Ammonia is a compound with the formula $\sf NH_3$.

In one molecule of ammonia, one nitrogen atom and three hydrogen atoms are present.