What is the periodic trend for atomic size from top to bottom in a group?

Answer 1

The size of an atom refers to its atomic radius. Atomic radius generally increases down a group. This is because the number of energy levels increase down a group with each additional period. Each of the subsequent energy levels are larger than the last, increasing the distance of the electrons from the nucleus, which increases the atomic radius.

Atomic radius generally decreases across a period. This is because electrons are being added to the same energy level at the same time that protons are being added to the nucleus. This creates a stronger force of attraction by the nucleus for the electrons, which pulls the electrons closer to the nucleus, decreasing the atomic radius.

It is important to note that the periodic trends are not laws. There are exceptions to the general trends in both the representative elements and the transitional elements.

Answer 2

Answering "What is the trend in variation of atomic size of elements across the period and down the group?"

Answer 3

In general, atomic size increaes from top to bottom within a group and decreases from left to right across a period.

Answer 4

Atomic size increases down a group and decreases across a period.

Answer 5

Moving left to right on the Periodic Table shows a decreasing trend in the atomic radius.

Answer 6

The atomic size decreases as it moves to the right/across.

The atomic size increases as it goes down.

Source: Chemistry Textbook (World of Chemistry)

Answer 7

Atomic radius decrease in periods from left to right and increase down in groups.

Answer 8

The calculated atomic radius increase down in a group.

Answer 9

The atomic radius of elements in a group increases with the atomic number.

Answer 10

the atomic radius increases