Variation of Atomic Size

Q.

What is the atomic size of an atom?

Q.

Which of the following is the correct descending order of atomic radius for the given elements?

1. Sr>Ca>Mg>Be

2. Mg>Br>Ca>Sr

3. Be>Sr>Mg>Ca

4. Be>Mg>Ca>Sr

Q.

Which one of these group 14 elements has the largest atomic radius?

1. C

2. Ge

3. Sn

4. Si

Q.

Complete the table below regarding physical periodic properties of elements.

Periodic Properties	Along the Period	Down the Group
Atomic radius
2. Ionisation potential
3. Electron affinity
4. Electronegativity
5. Metallic and Non-metallic Character

Q.

Which of the following $1^{st}$ group element has largest atomic radius?

1. H

2. K

3. Li

4. Na

Q.

In a group, the atomic size:

Q.

Define Electron affinity.

Q.

The elements of the second period of the Periodic Table are given:$LiBeBCNOF$
Give reason to explain why atomic radii decreases from $Li$to$F$.

Q.

Which of the following elements has the least distance from nucleus to the outermost shell?

1. S

2. P

3. Cl

4. Ar

Q.

How does the atomic size vary on moving down a group?

Q.

Atomic size ___ from left to right in a period.

Q.

Define atomic radius of an isolated atom. How does the atomic size vary in a period of the periodic table?

Q.

Which of the following trend is true for the given elements with respect to the atomic radius?

1. Na>Mg>Al>Si

2. Si>Mg>Al>Na

3. Mg>Na>Al>Si

4. Si>Al>Mg>Na

Q.

$\left(\mathrm{a}\right)$ The electropositive nature of the element(s) increases down the group and decreases across the period

$\left(\mathrm{b}\right)$Electronegativity of the element decreases down the group and increases across the period

$\left(\mathrm{c}\right)$ Atomic size increases down the group and decreases across a period (left to right)

$\left(\mathrm{d}\right)$ Metallic character increases down the group and decreases across a period.

Based on the above trends of the periodic table, answer the following about the elements with atomic numbers $3$ to $9$. Name the element with the smallest atomic size.