Question

What are the necessary conditions for nuclear fusion_?​

Answer 1

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To make fusion happen, the atoms of hydrogen must be heated to very high temperatures (100 million degrees) so they are ionized (forming a plasma) and have sufficient energy to fuse, and then be held together i.e. confined, long enough for fusion to occur. The sun and stars do this by gravity.

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Answer 2

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Nᴇᴄᴇssᴀʀʏ ᴄᴏɴᴅɪᴛɪᴏɴ ғᴏʀ Nᴜᴄʟᴇᴀʀ ғᴜsɪᴏɴ Aʀᴇ :-)

✯ Hɪɢʜ Tᴇᴍᴘᴇʀᴀᴛᴜʀᴇ.

✯ Hɪɢʜ Dᴇɴsɪᴛʏ.

❥︎ Tʜɴᴋᴇᴡ_!!! ㋛︎