Question

An element has electronic configuration as (2,8,3) Now , ans. the following questions
1. What is the atomic number of that element?
2. What is the group of that element?
3. To which peroid does the element belong?
4. what is the name and velocity of that element?​

Answer 1

1. Atomic number of the element is 13.

2. Group number is 13.

3. Period number is 3.

4. Since, there are 13 electrons & protons in it. So, the given element is Aluminium (2,8,3) and the valency of the aluminium is +3.

$\rule{200}2$

Additional Information

Atomic mass of Aluminium is 27 atomic mass units. (Atomic mass is the sum of number of protons and of neutrons.)

• It contains 13 protons, 14 neutrons and 13 electrons in it.
• As, there are 3 electrons in the outer most shell. Therefore, the valency of the Aluminium is 3.
• It's symbol is Al.
• It's melting point is 1221 °F
• It is silver-white in colour.
• It is a soft and light metal (ductile in nature)
• It can be recycled again.
• It is the most abundant metal in the earth's crust.
• Mostly found in Feldspars (rocks).
• It's weight is about ⅓ of steel.
• Good conductor of both electricity and heat.
• Used to make toys, decorative papers etc.

Answer 2

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⭐ANSwEr⭐

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GivEn:

An element has electronic configuration as (2,8,3)

1) Atomic number of that element is 13.

2)Given element is 13 th group.

3) Given element is 13 th period.

4)Name of an element is AluMiNium, valency of aluminium is 3.

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⭐ExtRa InforMatiOn⭐

♣️Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13.

♣️It is a silvery-white, soft, non-magnetic and ductile metal in the boron group. ...

♣️The oxides and sulfates are the most useful compounds of aluminium.