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prohojiy [21]
3 years ago
6

How many groups and periods are present in the periodic table?​

Chemistry
2 answers:
PilotLPTM [1.2K]3 years ago
7 0

Answer:

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. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements. Periods 4 and 5 have 18 elements.

Elenna [48]3 years ago
6 0

Answer:

<h2>18 groups</h2>

<u>In the periodic table, there are 7 periods and 18 groups.</u>

Explanation:

<u>#CARRY</u><u> </u><u>ON</u><u> </u><u>LEARNING</u>

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