Question

what are the elements having even atomic number​

Answer 1

Answer:

The number of protons in the nucleus, called atomic number, uniquely identifies a chemical element. The Oddo–Harkins rule argues that elements with odd atomic numbers have one unpaired proton and are more likely to capture another, thus increasing their atomic number.

Explanation:

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Answer 2

Answer:

The number of protons in the nucleus, called atomic number, uniquely identifies a chemical element. The Oddo–Harkins rule argues thatelements with odd atomic numbershave one unpaired proton and are more likely to capture another, thus increasing their atomic number.