Calculate the number of neutrons, protons and electrons in the HNO3 molecule.

| March 15, 2021 | education

The HNO3 molecule consists of one hydrogen atom, one nitrogen atom, and three oxygen atoms. First, let’s calculate the number of elementary particles for each type of atom.

According to the theory of atomic structure, the nucleus consists of protons and neutrons. In total, their number is equal to the relative atomic mass of the atom. The number of protons in the nucleus in the ground state of the atom is numerically equal to the number of electrons. The number of electrons, in turn, is equal to the ordinal number of the element in the periodic system of Mendeleev. Based on this data, we get the following data:

Hydrogen: 1 electron, 1 proton, 0 neutrons.

Nitrogen: 7 electrons, 7 protons, 7 neutrons.

Oxygen: 8 electrons, 8 protons, 8 neutrons.

We calculate in total: 1 * (1e, 1p, 0n) + 1 * (7e, 7p, 7n) + 3 * (8e, 8p, 8n) = 32e, 32p, 31n.

Answer: there are 32 electrons, 32 protons, 31 neutrons in a nitric acid molecule.



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