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Metals And Non-metals

Question

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How do we find whether a given element is a non-metal if we know its electronic configuration?

Solution

Non-metals contain 4–8 electrons in their outermost shells. Carbon, nitrogen, oxygen, fluorine and neon are non-metals, as these contain 4, 5, 6, 7, 8 electrons respectively in their outermost shells. Their atomic numbers and electronic configuration are as given below:

Non-metal

At. No.

Electronic configuration

K

L

M

Carbon

Nitrogen

Oxygen

Fluorine

Neon

6

7

8

9

10

2

2

2

2

2

4

5

6

7

8

Some More Questions From Metals and Non-metals Chapter

What do you understand by malleability and ductility of a metal? Give examples of two metals which are both ductile and malleable.

Define the terms: (i) Thermal conductivity (ii) Electrical conductivity.

Explain the term sonority.

What is meant by tensile strength?

Why are metals good conductors of heat and electricity?

Why do metals possess lustre?

Why are metals generally ductile and malleable?

What is meant by hardness of a substance? Name some metals which are hard.

Explain, how can we find out whether a given substance is a metal if we know its electronic configuration.

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