chemistry of life
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| what is not a subatomic partical? | isotope
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| electrons move about within certain limits called? | orbitals
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| the number of protons in the nucleus is an atom's? | atomic number
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| the number of protons and nuetrons combined is the atom's? | atomic mass
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| is not one of the major elements present in the human body? A.oxygen B.carbon C.nitrogen D.iron | iron
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| atoms usually unite with each other to form larger chemical units called? | molecules
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| substances whose molecules have more than one element in them are called? | compunds
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