Question

there are 7 ______ and 18 _____ in the Modern Periodic Table​

Answer 1

Answer:

There are 7 periods and 18 groups in the Modern Periodic Table.

Answer 2

Answer:

There are 7 periods and 18 groups in the Modern Periodic Table

Explanation:

There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. ... A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. There are a total of 18 groups.

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