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# Chemistry help

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1. Hey guys, it would mean loads if you could help me with this question, it seems simple but I can't seem to figure it out!

A) An atom of element Q contains the same number of neutrons as are found in an atom of 27 Al. An atom of Q also contains 14 protons.

I) Give the number of protons in an atom of 27 Al

II) Deduce the symbol, including mass number and atomic number, for this atom of element Q ( I looked at the periodic table and got the answer of 28.1 Si 14)

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3. (Original post by Qasim Abbassi)
Hey guys, it would mean loads if you could help me with this question, it seems simple but I can't seem to figure it out!

A) An atom of element Q contains the same number of neutrons as are found in an atom of 27 Al. An atom of Q also contains 14 protons.

I) Give the number of protons in an atom of 27 Al

II) Deduce the symbol, including mass number and atomic number, for this atom of element Q ( I looked at the periodic table and got the answer of 28.1 Si 14)

Simply do 27-14=13 neutrons for Q
Look for element has 14 protons
Which assuming you are correct is silicon
4. You're very close, the answer should be 28 Si
28.1 is an average based off all the isotopes and their relative abundancies, since you have both the proton and neutron numbers however, you can be more specific than the average Ar of a silicon atom and give the precise Ar of this silicon atom.
14 neutrons + 14 protons = 28
5. (Original post by Dr Cobbold)
Simply do 27-14=13 neutrons for Q
Look for element has 14 protons
Which assuming you are correct is silicon
Thanks so much!!!
6. (Original post by k.russell)
You're very close, the answer should be 28 Si
28.1 is an average based off all the isotopes and their relative abundancies, since you have both the proton and neutron numbers however, you can be more specific than the average Ar of a silicon atom and give the precise Ar of this silicon atom.
14 neutrons + 14 protons = 28
Omg thanks!!! i don't feel confused anymore lol! x

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Updated: September 17, 2016
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