Question

Periodic trend data for the first 36 elements, choose one of the trend for example atomic radius then graph the data for that trend using the 36 elements. Then summarize and explain the trend you notice from graph! Is there anything? Any surprise element that don’t quite fit the trend? Identify and try to explain.

Answer 1

Answer:

Atomic radius patterns are observed throughout the periodic table. Atomic size gradually decreases from left to right across a period of elements. This is because, within a period or family of elements, all electrons are added to the same shell.

Answer 2

Explanation:

The distance between the nucleus and outermost shell is called the Atomic radius.

In groups:

• Atomic radius increases in the groups from top to bottom due to an increase in atomic number.

• Addition of ans extra shell of electrons in each stage.

In periods:

• In periods atomic number increases left to right, the atomic radius decreases because of the increase in the positive charge in the nucleus.

Exception:

• In periods it decreases on going from left to right upto 17th group, then it increases in 18 group.
• The atomic radius of oxygen is slightly greater than the Nitrogen because the force of attraction between nuclei and electrons increases.