Question

All the mass of an atom is concentrated in it

Answer 1

Answer:

The mass of the atom is concentrated in the nucleus (protons and neutrons are about 2000 times as heavy as electrons).

Answer 2

꧁༺ᗩᑎՏᗯᗴᖇ༻꧂

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ᴛʜᴇ ᴍᴀss ᴏғ ᴛʜᴇ ᴀᴛᴏᴍ ɪs ᴄᴏɴᴄᴇɴᴛʀᴀᴛᴇᴅ ɪɴ ᴛʜᴇ ɴᴜᴄʟᴇᴜs (ᴘʀᴏᴛᴏɴs ᴀɴᴅ ɴᴜᴄʟᴇᴜs ᴀʀᴇ ᴀʙᴏᴜᴛ 2000 ᴛɪᴍᴇᴅ ᴀs ʜᴇᴀᴠʏ ᴀs ᴇʟᴇᴄᴛʀᴏɴs).

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✰ᕼOᑭᗴ IT ᕼᗴᒪᑭՏ YOᑌ...!!!!