Question

Write difference between groups and periods

Answer 1

Periodic

(1) Periodic are horizontal row on the periodic table.

(2) increase from left to right

Group

(1) Group are vertical columns on the periodic table.

(2) increase from bottom to top.

Answer 2

$\huge\bf{Groups \::-}$

• Groups are the vertical columns in the periodic table.
• All the chemical elements in the same group contain an equal number of valence electrons.
• There are mainly 18 groups in the periodic table.
• However, some groups have common names as well.
• For example, we call the group 1 element as alkali metals and group 2 elements as alkali earth metals.

$\huge\bf{ Periods\::-}$

• Periods are the horizontal rows in the periodic table.
• All the chemical elements in this row have the same number of electron shells.
• When we go through a row, the number of protons in the atomic nucleus increases by 1 for each next element in the period.
• The elements get less metallic when we move forward a row.
• Periods have different numbers of members; there are more chemical elements in some periods than some other periods