Question

The electronic configuration of an atom is 2,8,7. Give its atomic number, nature of oxide.

Answer 1

Explanation:

Atomic number = 2 + 8 + 7=17

Name of the element : Chlorine (Cl)

Nature of oxide: Acidic, as Chlorine forms Acidic solution with water.

Answer 2

The atomic number of the atom is 17 and it forms acidic oxide

Explanation:

Electronic configuration tells us about the number of electrons that are present in an atom. It also determines the atomic number of an element.

Atomic number is defined as the number of electrons or number of protons present in a neutral atom.

We are given:

Electronic configuration of the element = 2, 8, 7

Number of electrons in an atom = [2 + 8 + 7] = 17

The element having atomic number '17' is Chlorine and this element is a non-metal.

Oxides are formed when a metal or a non-metal reacts with oxygen molecule. There are two types of oxides which are formed: Acidic oxides and basic oxides.

• Acidic oxides are formed by the non-metals.
• Basic oxides are formed by the metals.

The given element is a non-metal and will form acidic oxide.

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