the mass number of an element is 18. it contains 7 electrons. what is the number of protons and neutrons in it. what is the atomic number of the element ?
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THE NUMBER OF PROTONS IS 7
ATOMIC NUMBER IS 7
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Hello mate !!!
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your answer .
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no. of proton = no. of electro = 9
atomic no. is 9 and the element is florine
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#hope it help uh.
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harshitagarwal624:
thanq
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