Horizontal rows are termed as periods. There are 7 periods in periodic table.
There are 7 periods in the modern periodic table.
Periods are the horizontal rows in the periodic table of Mendeleev; this table contain 7 periods.
The periodic table has 18 groups ant 7 periods. Hydrogen and helium are considered members of the first period.
There were three geological periods in the Mesozoic Era(251 - 65Ma).The Triassic Period(251 - 199Ma),the Jurassic period(199 - 145Ma) &the Cretaceous Period(145 - 65Ma).
3 periods
Californium hasn't "periods" inside.
there are four periods in basketball
4
6 periods
7 periods.
there are 7 periods in the periodic table118
The time periods are called quarters and there are four of them.
The periodic table has 7 periods on it.
A hockey game consists of three periods.
Many poems have no full stops (periods) at all. Otherwise, the longer the poem is, the more it potentially has.
no one knows how many periods are in a day but a regular period usually lasts about a week or so.