Given alongside is a part of the periodic table :

$\begin{matrix} L i & B e & B & C & N & O & F N a & M g & A l & S i & P & S & C l \end{matrix}$

As we move horizontally from left to right :

(i) What happens to the metallic character of the elements ?

(ii) What happens to the atomic size ?

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Solution

(i) The metallic property of elements decreases as we move horizontally from left to right.

(ii) The atomic size of elements decreases as we move horizontally from left to right.

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Q. Give alongside is a part of the periodic table :
As we move horizontally from left to right:

Li	Be		B	C	N	O	F
Na	Mg		Al	Si	P	S	Cl

(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?

(a) What are the periods and groups in a periodic table? Give two characteristics of each.

(b) In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group.

$\begin{matrix} L i & B e N a K R b C s F r & R a \end{matrix}$

(i) What happens to the size of atoms?

(ii) What happens to their metallic character?

(d) Name two properties of elements whose magnitudes change when going from top to bottom in a group of the periodic table. In what manner do they change?

(e) Rewrite the following statement after correction, if necessary :

Groups have elements with consecutive atomic numbers.

Q. (a) What are the periods and groups in a periodic table? Give two characteristics of each.
(b) In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group.
(c) Given alongside is a part of the periodic table. As we move vertically downward from Li to Fr:

Li	Be
Na
K
Rb
Cs
Fr	Ra

(i) What happens to the size of atoms?
(ii) What happens to their metallic character?
(d) Name two properties of elements whose magnitudes change when going from top to bottom in a group of the periodic table. In what manner do they change?
(e) Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.

(a) How does the size of atoms (atomic size) generally vary in going from left to right in a period of the periodic table? Why does it vary this way?

(b) What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?

While we move from left to right in a period, what happens to the non-metallic character of the elements?

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Given alongside is a part of the periodic table : LiBe BCNOFNaMgAlSiPSCl As we move horizontally from left to right : (i) What happens to the metallic character of the elements ? (ii) What happens to the atomic size ?

(i) The metallic property of elements decreases as we move horizontally from left to right. (ii) The atomic size of elements decreases as we move horizontally from left to right.

Given alongside is a part of the periodic table :

$\begin{matrix} L i & B e & B & C & N & O & F N a & M g & A l & S i & P & S & C l \end{matrix}$

As we move horizontally from left to right :

(i) What happens to the metallic character of the elements ?

(ii) What happens to the atomic size ?

(i) The metallic property of elements decreases as we move horizontally from left to right.

(ii) The atomic size of elements decreases as we move horizontally from left to right.