Periodic Trends

Question 1

Atomic Radius

Answer 1

Used to describe the size of an atom, which is measured by halving the distance between the nuclei of adjacent atoms.

Question 2

Atomic Radius Trend

Answer 2

Atomic radii decreases from the left to right across the Period because of electrostatic attractions. It also increases as you move down a Group.

Question 3

Valency

Answer 3

The combining power of an element as determined by the number of electrons in its outer shell.

Question 4

Valency Trend

Answer 4

Valency increases across a Period, with the noble gas in any Period having complete sub levels.

Question 5

Ionisation Energy Trend

Answer 5

Increases as you move from left to right across a Period on the table. It also decreases as you move down a Group

Question 6

Electronegativity Trend

Answer 6

Electronegativity increases as you move across a Period from left to right. Aswell as decreasing as you move down a Group.

Question 7

Why Does Atomic Radius Have That Trend?

Answer 7

Because of the Electron Shielding effect. An atom with more electrons, will be bigger than an atom with less electrons. Atomic radius is similar to a person wearing jumpers, the more electrons, or jumpers are there, the bigger the atom appears.

Question 8

What Is The Electron Shielding Effect?

Answer 8

It is the attraction between an electron and the nucleus in any atom with more than one electron. This is due to a difference in the attraction forces on the electrons in the atom