Question

Helium atom has an atomic mass of
4U and 2 Proton in its nucleus how many nutrients does it have ​

Answer 1

ANSWER

No. of Protons + No. of Neutrons = (No. of electrons) = Mass number.

The mass number of He = 4

No.of Protons in He = 2

Using the formula,

No. of Protons + No. of Neutrons = Mass number.

No. of Neutrons = Mass number - No.of Protons

No. of Neutrons = 4-2 = 2

Therefore, No.of Neutrons in Helium atom = 2

I hope you understand

Answer 2

$\huge\mathfrak\green{ᴀɴsᴡᴇʀ}$

ᴀᴛᴏᴍɪᴄ ᴍᴀss ᴏғ ʜᴇʟɪᴜᴍ ᴀᴛᴏᴍ = $4$u, $2$ ᴘʀᴏᴛᴏɴs ɪɴ ʜᴇʟɪᴜᴍ ɴᴜᴄʟᴇᴜs

ᴀᴛᴏᴍɪᴄ ᴍᴀss = ɴᴜᴍʙᴇʀ ᴏғ ᴘʀᴏᴛᴏɴs + ɴᴜᴍʙᴇʀ ᴏғ ɴᴇᴜᴛʀᴏɴs

$4 = 2$ + ɴᴜᴍʙᴇʀ ᴏғ ɴᴇᴜᴛʀᴏɴs

ɴᴜᴍʙᴇʀ ᴏғ ɴᴇᴜᴛʀᴏɴs = $4 – 2 = 2$

ʜᴇɴᴄᴇ, ʜᴇʟɪᴜᴍ ʜᴀs $2$ ɴᴇᴜᴛʀᴏɴs.