CHEMISTRY TEST

If you are given an element which is a inert gas i.e. it has valency 0. Then tell what will be the valency

of the element that comes before it and after it respectively?(ALL QUESTIONS ARE BASED ON THE

PROPERTY OF ELEMENTS WITH ATOMIC NUMBER 1-20 ONLY)


If you are given an element whoose valency is 4 then tell what will the valency of the element which is

at 3rd position after it? (Take the given element as 0 and then count)


An element has 2 electrons in its K orbit(1st Orbit) and the element which is at 2nd position after it

(same condition as in previous question) has 1 electron in is last orbit. Name the given

element and tell its electronic configuration.


Which three elements are ISOBARS(ELEMENTS HAVING SAME MASS NUMBER BUT DIFFERENT

ATOMIC NUMBER) in the list (Atomic Number 1- 20).


Which of the following valency pattern is right for elements under ATOMIC NUMBER 1-20?

a> 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3/5, 2, 1, 0, 1, 2

b> 1, 0, 2, 3, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 2, 1, 3, 1, 2

c> 1, 2, 3, 4, 3, 0, 1, 2, 3, 0, 0, 2, 1, 0, 2, 3, 0, 1, 2, 0

d> THERE IS NO SPECIFIC PATTERN


Following are the two options listing the name of elemets in ascending order according to their

Atomic Number.

A> H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca

B> H, He, Li, B, Be, C, N, O, F, Mg, Al, Ne, Na, Si, P, S, Cl, Ar, K, Ca

WHICH IS THE RIGHT ONE?
























Description:

Lets know how powerful your memory is? I'll ask question on the basis of Atomic Number, Mass number, No. of neutrons, Electronic Configuration and Valency of elements between 1-20(atomic number)! And also, you will get a little hint how to remember it! So, without wasting the time LET US PROCEED and feel free to ask questions in comment!

Discussion

Rishikesh Kimmatkar Iit Home

I GOT Full MARKS

1768 days 22 hours 41 minutes ago

Rutkar Bhat

how is pottasium mass no. same as that of argon and calcium

1881 days 21 hours 16 minutes ago

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