what happens to atomic size along period and group Related: Periodic Properties - Classification of Elements?

Question

what happens to atomic size along period and group Related:  Periodic Properties - Classification of Elements?

Answer

The atomic size decreases from left to right along a period and atomic size increases from top to bottom along a group . With increasing atomic number along a period, the effective nuclear charge increases . Hence attraction of nucleus to outer most electrons increases . ... But along a group , new shell is added .

Answer

Ravindrapatel

Answer

Atomic size decreases from left to right along period. This is due to increase in nuclear charge which tends to pull electrons from the outermost orbit closer to the nucleus and reduce the size of atom. OR More number of electrons are added to the same shell.

Atomic size increases down the group this is because new shells are being added as we go down the group.

Answer

Atomic Size along a Period:
The atomic size refers to the size of an atom, which is determined by the distance between the nucleus and the outermost electron. The atomic size generally decreases as we move from left to right along a period in the periodic table.

Explanation:
- As we move across a period from left to right, the number of protons and electrons in the atoms increases. This results in a stronger attractive force between the positively charged nucleus and the negatively charged electrons.
- The increase in the nuclear charge pulls the electrons closer to the nucleus, reducing the atomic size.
- Additionally, the number of electron shells remains the same across a period, so the increase in nuclear charge has a greater effect on reducing the atomic size.

Atomic Size along a Group:
The atomic size generally increases as we move down a group in the periodic table.

Explanation:
- As we move down a group, the number of electron shells increases. Each successive shell is further from the nucleus, resulting in an increase in atomic size.
- The increase in atomic size is primarily due to the addition of new energy levels or shells, which increase the distance between the nucleus and the outermost electrons.
- Although the number of protons and electrons also increases down a group, the effect of the increase in nuclear charge is outweighed by the increase in electron shells.

Summary:
- Along a period, the atomic size decreases from left to right due to the increase in nuclear charge and the absence of additional energy levels.
- Along a group, the atomic size increases as we move down due to the addition of new energy levels or shells, which outweighs the increase in nuclear charge.

Overall, the atomic size is influenced by the number of electron shells, nuclear charge, and the attractive forces between electrons and the nucleus. The periodic trend of atomic size provides valuable insights into the arrangement and properties of elements in the periodic table.

Answer

The atomic size of elements decreases from left to right across a period. Across a period the number of shells are the same but the number of electrons and protons increase one by one. There will be more force of attraction towards the nucleus as we go across a period. So the shell shrinks.

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