Name two elements in halogens.

One Line Answer

Chlorine and bromine.

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Chapter 1: Periodic Table, Periodic Properties and Variations of Properties - lntext Questions [Page 5]

Chapter 1 Periodic Table, Periodic Properties and Variations of Properties
lntext Questions | Q 5. (iii) | Page 5

How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.

State modern periodic law.

State how the valency of elements varies in a group of the periodic table?

The horizontal rows in a periodic table are called _____.

Give the symbol and valency of the following element and radical.

Sulphate

Give the chemical formula of sodium nitrate

Give the chemical formula of carbonic acid

The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?

An element with atomic number ______ will form a basic oxide.

Match the atomic number with the following:

An element of group 2.