Name the non-metals in the first twenty elements.

एक पंक्ति में उत्तर

C, N, O, F, Ne, P, S, Cl, Ar, H and He.

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अध्याय 1: Periodic Table, Periodic Properties and Variations of Properties - lntext Questions [पृष्ठ ५]

अध्याय 1 Periodic Table, Periodic Properties and Variations of Properties
lntext Questions | Q 10. (iii) | पृष्ठ ५

What is periodicity in properties of elements with reference to the Modern Periodic Table?

Name two elements in halogens.

What is the number of elements in the 3^rd period, of the modern periodic table?

Name the cation and the anion in the salt – calcium sulphate

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

Aluminium

Give the chemical formula of carbonic acid

Complete the following flow chart.

Which one of the following elements exhibit maximum number of valence electrons?

Compare the radii of two species X and Y. Give reasons for your answer.

Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
Determine its position in the modem periodic table.
What is the nature of its oxide?
Name one other element of its group.