SMANSA Science

Miss Amiee asked:


Hey guys I have a chemistry test tomorrow ! It is a test on electrons neutrons and protons.

i have just a few questions

what is the nucleus of the atom held together by?

Can you tell me more about isotopes?

What are the “Must Remembers” about atoms? what must i know before the test? the test will be all on atoms
oh and isotopes such as hydrogen 1 hydrogen 2 and hydrogen 3 are atoms of the same element that differ in what?

thanks a bunch

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