Question

an atom A has 7 ptrotons and an atom B has 9 protons identify the atomic number
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Answer 1

Answer:

atomic number of atom A is 7 and of atom B is 9

Answer 2

Answer- The above question is from the chapter 'Structure of an Atom'.

Let's know about atomic number first.

Atomic Number- The atomic number of an element is the number of protons present in the nucleus of that element.

Atomic number is represented by Z.

It is also called Proton Number.

For an atom of an , number of protons = number of electrons = Atomic Number

But the above relation is not true for ions of elements.

For example:

Let's take an element Sodium.

Number of protons = 11

Number of electrons = 11

∴ Atomic number (Z) = 11

Given question: An atom A has 7 protons and an atom B has 9 protons. Identify the atomic numbers.

Answer: For an atom A,

Number of protons = 7

So, atomic number of A = 7

For an atom B,

Number of protons = 9

So, atomic number of B = 9

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