Match the following: List I List II 1. most electronegative (i) I2 2. most electron affinity (ii

step 1 is match the polar. So first is the element with highest Aeroen negativity. Element with the hig

Match the following: List I List II 1. most electronegative...

Match the following: List I List II 1. most electronegative (i) $\mathrm{I}_{2}$ 2. most electron affinity (ii) At 3. liquid halogen (iii) $\mathrm{F}_{2}$ 4. radio active halogen (iv) $\mathrm{Cl}_{2}$ (v) $\mathrm{Br}_{2}$ The correct matching is: $\begin{array}{llll}1 & 2 & 3 & 4\end{array}$ (a) (iii) (iv) (v) (ii) (b) $\begin{array}{ll}\text { (iii) (iv) } & \text { (v) }\end{array}$ (i) (c) (ii) (i) (iii) (iv) (d) $\begin{array}{llll}\text { (iii) (i) } & \text { (ii) } & \text { (iv) }\end{array}$

Match the following:
List I List II
1. most electronegative
(i) $\mathrm{I}_{2}$
2. most electron affinity
(ii) At
3. liquid halogen
(iii) $\mathrm{F}_{2}$
4. radio active halogen
(iv) $\mathrm{Cl}_{2}$
(v) $\mathrm{Br}_{2}$
The correct matching is:
$\begin{array}{llll}1 & 2 & 3 & 4\end{array}$
(a)
(iii)
(iv)
(v)
(ii)
(b) $\begin{array}{ll}\text { (iii) (iv) } & \text { (v) }\end{array}$
(i)
(c)
(ii)
(i)
(iii)
(iv)
(d)
$\begin{array}{llll}\text { (iii) (i) } & \text { (ii) } & \text { (iv) }\end{array}$

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Key Concepts

Electronegativity

Electronegativity is the measure of an atom’s ability to attract electrons when bonded to another atom. It generally increases across a period and decreases down a group in the periodic table, influencing how atoms share or transfer electrons during bond formation.

Electron Affinity

Electron affinity refers to the energy change that occurs when an electron is added to a neutral atom to form an anion. This property, which is related to but distinct from electronegativity, provides insight into an element's tendency to gain electrons during chemical reactions.

Physical States of Elements

The physical state (solid, liquid, or gas) of an element at a given temperature is determined by its molecular structure and intermolecular forces. For certain groups of elements, like the halogens, these states vary noticeably across the group, affecting their practical applications and behavior in reactions.

Radioactive Properties

Radioactivity is a characteristic of elements with unstable nuclei that decay by emitting particles or radiation. Recognizing which elements are radioactive is important for understanding their potential health risks, stability, and the role they play in both natural processes and technological applications.

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