Question

what is the atomic number of helium​

Answer 1

Explanation:

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ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ɴᴜᴍʙᴇʀ ɪs 2.

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Answer 2

Answer:

Helium

atomic number. 2

symbol. He

atomic mass. 4u

it is a noble gas

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