Question

answer the following​

Answer 1

~Explanatión :-

7. Gaining three electrons

8. (Group 3 elements have 3 valence electrons) - Boron

9. The atom will become positively charged because it has lost an electron.

10. Sulphur.

Number of protons = Number of electrons

So, number of electrons is also 16. And 16th element in the periodic table is sulphur.

_____________________________

~State true or false :-

1. False (It has total of 8 valence electrons)

2. True

3. True

4. False (Maximum no. of electrons in L shell is 8)

5. True

_____________________________

Question 1

What is the difference between valency and valence electrons?

-- Valency is the combining capacity of an atom, i.e how many electrons an atom can gain or loose. Valence electrons are the total number of electrons in the outermost shell of any atom.

Question 2

Write the electric configuration of first 20 elements and write the valency under it.

-- Refer to attachment

Question 3

Electronic configuration = 2,8,7

Atomic no. = 17

Element X = Chlorine

Valency = 8 - 7 = 1

Valency electrons = Electrons in outer shell = 7

Answer 2

Explanation :-

7. Gaining three electrons

8. (Group 3 element have 3 valence electrons) - Boron

9. The atom will become positively charged because it has lost an electron.

10. Sulphur.

Number of protons = Number of electrons

So, number of electrons is also 16. And 16th element in the periodic table is sulphur.

State true or false :-

1. False (It has total 8 valence electrons)
2. True
3. True
4. False (Maximum no. of electrons in L shell is 8)
5. True

Question 1

What is difference between valency and Valence electrons?

-- Valency is the combinig capacity of an atom, i,e how many electrons an atom can gain or loose. Valence electrons are the total number of electrons in the outermost shell of any atom.

Question 2

Write the electronic configuration of first 20 elements and write the valency under it.

-- Refer to attachment

Question 3

Electronic configuration = 2,8,7

Atomic no. = 17

Element X = Chlorine

Valency = 8 - 7 = 1

Valency electrons = Electrons in outer shell = 7