What does the atomic number of an element represent? a) the number of orbitals b) the number of electrons c) the number of neutrons d) the number of protons

Option (D) is the correct answer.

Explanation:

Atomic number is the sum of total number of protons present in an atom.

For example, as atomic number of chlorine is 17 which also means that number of protons present in a chlorine atom are 17.

And, in a neutral atom the number of protons equal to the number of electrons.

Atomic mass is defined as the sum of total number of protons and neutrons present in an atom.

Therefore, we can conclude that the atomic number of an element represent the number of protons.

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nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.