Copy and complete the following sentences choosing the correct word or words from those given in the brackets- at the end of each sentence-1 The properties of the elements are a periodic function of their atomic number- mass number- relative atomic mass-2 Moving across a of the periodic table- the elements show increasing3 The element at the bottom of a group would be expected to show metallic character than the element at the top less- more-4 The similarities in the properties of elements belonging to a group is because they have the same electronic configurations- number of outer electrons- atomic number-

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Variation of Atomic Size

Copy and comp...

Question

Copy and complete the following sentences choosing the correct word or words from those given in the brackets, at the end of each sentence:
(1) The properties of the elements are a periodic function of their _____ (atomic number, mass number, relative atomic mass).
(2) Moving across a of the periodic table, the elements show increasing _ character (group, period, metallic, non-metallic).
(3) The element at the bottom of a group would be expected to show metallic character than the element at the top (less, more).
(4) The similarities in the properties of elements belonging to a group is because they have the same ___ (electronic configurations, number of outer electrons, atomic number).

Open in App

Solution

(1) The properties of the elements are a periodic function of their atomic number .
(2) Moving across a period of the periodic table, the elements show increasing non-metallic character.
(3) The element at the bottom of a group would be expected to show more metallic character than the element at the top.
(4) The similarities in the properties of elements belonging to a group is because they have the same number of outer electrons.

Suggest Corrections

Similar questions

The statement that is not correct for periodic classification of elements is
(a) The properties of elements are the periodic function of their atomic numbers
(b) Non-metallic elements are less in numbers than metallic elements
(c) For transition elements, the 3d orbitals are filled with electrons after 3 p - orbitals and before 4s orbitals
(d) the first ionization enthalpies of elements generally increase with the increase in atomic number as we go along a period

Q. When elements are placed in the order of their increasing atomic number,
the elements having the same number of __________ is repeated in such a way, so as to fall under the same group. Since, the electronic configuration of the valence shell electrons is same they show similar properties.

(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. The electronegativities (according to Pauling) of the elements in period 3 of the periodic table are as follows. The elements are arranged in alphabetical order:

Al	Cl	Mg	Na	P	S	Si
1.5	3.0	1.2	0.9	2.1	2.5	1.8

(i) Arrange the elements in the order in which they occur in the periodic table from left to right. (The group 1 elements first, followed by the group 2 element and so on, up to group 7.)
(ii) Choose the word or phrase from the brackets which correctly completes each of the following statements:
(a) The element below sodium in the same group would be expected to have a _________ (lower/higher) electronegativity than sodium and the element above chlorine which would be expected to have a ________ (lower/higher) ionization potential than chlorine.
(b) On moving from left to right in a given period, the number of shells _________ (remains the same/increases/decreases).
(c) On moving down a group, the number of valence electrons __________ (remains the same/increases/decreases).

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.

Join BYJU'S Learning Program