The Periodic Table

Question 1

Define Atomic radius

Answer 1

The atomic radius is a measure of the size of an atom.

Question 2

What is the period table?

Answer 2

The periodic table of the elements is a method of showing the chemical elements in a table with the elements arranged in order of increasing atomic number.

Question 3

Define Ionisation energy

Answer 3

The first ionisation energy is the energy needed to remove one electron from an atom in the gas phase. The ionisation energy is different for each element. We can also define second, third, fourth, etc. ionisation energies. These are the energies needed to remove the second, third, or fourth electron respectively.

Question 4

Define Electron affinity

Answer 4

Electron affinity can be thought of as how much an element wants electrons.

Question 5

Define Electronegativity

Answer 5

Electronegativity is the tendency of atoms to attract electrons. The electronegativity of the elements starts from about 0.7 (Francium (Fr)) and goes up to 4 (Fluorine (F))

Question 6

What is a Group?

Answer 6

A group is a vertical column in the periodic table and is considered to be the most important way of classifying the elements.

Question 7

What is a period?

Answer 7

A period is a horizontal row in the periodic table of the elements.