Question

What is the periodic table? How are the periods and groups arranged in it? ​

Answer 1

Explanation:

Groups and periods are two ways of categorizing elements in the periodic table. Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.

Answer 2

Answer:

groups and periodsare the two ways of categorising elements in the periodic table. periods are horizontally Rose the periodic table, while groups are vertically columns that evil. atomic number increases as you move down a group or across a period