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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ash asked:


hey guys im stuck on these 2 biology questions i need some help really bad so if you can please help me. 10points and best answer. thanks so much(if its not to much to ask please explain as simple as possible it gets confusing if there is to much information)

Explain why we are still piecing together a picture of how human evolution occurred, and how is it possible that our understanding of it might be flawed?

What are three advantages of using scientific names for organisms?

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