Physics, 25.09.2019 06:50 camillexv2668

If an element has 6 electrons, how many of them will be in the 2nd energy level?
how many neutrons does element x have if its atomic number is 54 and its mass number is 163?
if element x has 106 protons, how many electrons does it have?
an element's atomic number is 29. how many protons would an atom of this element have?

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If an element has 6 electrons, how many of them will be in the 2nd energy level?
how many neu...

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