Embibe Experts Solutions for Exercise 2: Assignment Set-2

An element, $\mathrm{X}$ has electronic configuration of $2,8,8,2.$ The incorrect statement(s) about this element is/are

(i) It belongs to $10$ th group of the periodic table.
(ii) It has $20$ protons.
(iii) Its ionisation energy is higher than the element placed left to this in the same period but lower than the element placed just above it.

The symbol of element with atomic number $105$ is

Which of the following elements show properties that are characteristic of both metals and non-metals?

Which of the following pairs of elements do not follow Newland's law of octave?

An element with atomic number $34$ belongs to

The electronic configuration for the various elements are given below

a. $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^5$
b. $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^1$
C. $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^2$
d. $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6$

From the above configurations, the correct order of their ionisation energy will be

Metallic character is maximum for

The correct order for the mentioned property is