How many groups and periods are there in the modern periodic table?
7 Groups and 18 Periods
18 Groups and 7 Periods
18 Groups and 18 Periods
18 Groups and 9 Periods
The Modern periodic table has vertical columns called groups and horizontal rows called periods. There are 18 groups and 7 periods in total.
(a) State the modern periodic law.
(b) How many periods and groups are there in the modern periodic table?
How many groups and periods are there in the modern periodic table? How do the atomic size and metallic character of elements vary as we move: (a) down a group and (b) from left to right in a period