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Classification Of Elements And Periodicity In Properties

Question

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The first (IE₁) and second (IE₂) ionisation enthalpies (kJ mol^-1) of a few elements by Roman numerals are as shown:

IE₁ IE₂
i 2372 IE₂
ii 520 7300
iii 900 1760
iv 1680 380

which of the above elements is likely to be:
(i) a reactive metal
(ii) a reactive non-metal
(iii) a noble gas
(iv) a metal that forms a stable binary halide of the formula AX₃ (X = halogen).

Solution

(i) Reactive metal II.
(ii) Reactive non-metal IV.
(iii) A noble gas I.
(iv) Metal forming halide III.

Some More Questions From Classification of Elements and Periodicity in Properties Chapter

How many elements are placed in each period of the p-block?

What is the number of groups in: (i) p-block (ii) d-block?

How many elements are present in:
(i) second period
(ii) fourth period
(iii) sixth period?

What is the name given to the s-block elements?

To which block the element with outer electronic configuration 4s²3d¹⁰ belongs?

Why are there 10 elements in each series of d-block?

In terms of electronic configuration,
what is common in a given period and group?

Give the general electronic configuration of
(i) Transition elements (ii) Inner transition elements.

Name the group and period to which an element with Z = 15 belongs ?

What are the advantages of periodic classification of elements?

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