There are currently 118 elements currently, with 20 man-made and 88 (not 92) naturally-occurring elements. *Since 23rd October 2008.
7
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 and 7 periods.
there are 7peroids
The periodic table has 7 periods on it.
The modern periodic table has seven periods.
7The periodic table has 7 periods and 18 groups.
there are 7 periods in the periodic table118
there are 7 periods in the periodic table118
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.
There are 7 periods in the modern periodic table.
7 periods and 18 groups are there on the modern periodic table.
7The Periodic Table has 7 periods and 18 groups.
The Periodic Table has 18 groups and 7 periods.