Chemistry, asked by cacoon9254, 9 months ago

The first period has____elements and are called____periods

Answers

Answered by Anonymous
1

Explanation:

The Bohr Atom

The simplest atoms, hydrogen and helium, are found in row 1, or the first period. These atoms have electrons occupying the energy level n=1. Moving down, row 2, or period 2, contains the elements Li (lithium) through Ne (neon).

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