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Classification Of Elements And Periodicity In Properties

Question

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What are the major differences between metals and non-metals?

Solution

Metal	Non-metal
Metals have a strong tendency to lose electrons to form cations. Thus, metal is strong reducing agent.	Non-metals have a strong tendency to accept electrons to form the anion. Thus, non-metal are the strong oxidising agent.
Metal have low ionization enthalpies.	Non-metal have high ionization enthalpies.
Less negative electron gain enthalpies.	High negative electron gain enthalpies.
Metal have low electronegativity.	Non-metal have high electronegativity.
Metal have less negative electron gain enthalpies.	Non-metal high negative electron gain enthalpies.
Metal forms a basic oxide and ionic compounds.	Non-metal forms acidic oxides and covalent compounds.

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

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?

In the modern periodic table, the period indicates the value of:
(a) atomic number
(b) atomic mass
(c) principal quantum number
(d) azimuthal quantum number.

Which of the following statements related to the modern periodic table is incorrect?
(a) The p-block has 6 columns, because a maximum of 6 electrons can occupy all the orbitals in a p-shell.

(b) The d-block has 8 columns, because a maximum of 8 electrons can occupy all the orbitals in a d-subshell.

(c) Each block contains a number of columns equal to the number of electrons that can occupy that subshell.

(d) The block indicates value of azimuthal quantum number (l) for the last subshell that received electrons in building up the electronic configuration.

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