Question

If an atom of an element X is written as 32 16X then answer the following. 2 (i) What does the number 32 indicate? (ii) What does the number 16 indicate ? (iii) What is the number of protons in atom X? (iv) What is the number of neutrons in atom X? (v) What is the number of electrons in atoms X? (vi) Write the electronic configuration of atom X? (vii) What is the valency of atom X? (viii) Identify the element

Answer 1

Answer:

1. 32 indicates atomic mass
2. 16 indicate number of protons
3. 16
4. Number of neutrons =32-16=16
5. Number of electrons =16
6. 1s^2 2s^2 2p^6 3s^2 3p^4
7. Valency is 6
8. Element is sulphur
9. Hope you are satisfied with the answer
10. PLEASE MARK AS BRAINLIEST

Answer 2

Answer:

(i) 32 indicates mass number. (ii) 16 indicates atomic number. (iii) Number of protons = 16. (iv) Number of neutrons = 16. (v) Number of electrons = 16. (vi) Electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^4$ (vii) Valency is 2. (vii) Element is Sulphur.

Explanation:

• A chemical element is represented by

        $\Big\limits^A_Z X$

• where Z is atomic number, A is mass number and X is symbol of the element.
• The atomic number, Z is also equal to number of protons in an atom.
• The mass number, A is the sum number of protons and neutrons in an atom.

Given an element represented as

        $\Big\limits^{32}_{16} X$

(i) 32 is in the place of A, and A is the mass number.

So, the mass number of the given element is 32.

(ii) 16 is in the place of Z, and Z is the atomic number.

So, the atomic number of the given element is 16.

(iii) Atomic number, Z is also equal to number of protons in an atom. Therefore, the number of protons in the given element is 16.

(iv) Mass number of the given element is 32.

Mass number = number of neutrons + number of protons

$\implies 32=N+16\implies N=16$

Therefore, the number of neutrons = 16.

(v) As the element is in neutral state, number of protons is equal to the number of electrons.

Therefore, the number of electrons = 16

(vi) Electronic configuration of an element describes the occupancy of electrons in its atomic orbitals.

The atomic number of the given atom is 16, hence the electronic configuration of atom X can be written as  

$1s^2 2s^2 2p^6 3s^2 3p^4$

(vii) Valency defines the combining capacity of an element.

From the electronic configuration of the atom, it can be seen that the outermost orbital has 6 electrons shell, and hence the number of valence electrons is 6.

To complete the octet, the element needs to gain 2 electrons, so its valency is 2.

(vii) The element at atomic number 16 is Sulphur.

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