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chemistry help

using the periodic table, how can i figure out how many shells and electrons it has in that outer shell? I cant remember it and i dont know what to google, thanks. what i mean is that the period and group represents something
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have
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Original post by Gent2324
using the periodic table, how can i figure out how many shells and electrons it has in that outer shell? I cant remember it and i dont know what to google, thanks. what i mean is that the period and group represents something


At a GCSE level,
Group = Number of electrons in outer shell
Period = Number of shells
Reply 2
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HEPTAKE
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What about the ions an element has? How do I find that out?
Original post by Gent2324
using the periodic table, how can i figure out how many shells and electrons it has in that outer shell? I cant remember it and i dont know what to google, thanks. what i mean is that the period and group represents something

Group number = number of electrons on outer shell
Period number = number of shells an atom has
Original post by have
At a GCSE level,
Group = Number of electrons in outer shell
Period = Number of shells


Original post by lmaooome
Group number = number of electrons on outer shell
Period number = number of shells an atom has


great thanks, is there an easy way i can find out if a metal is more / less reactive than hydrogen? (electrolysis)
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Original post by Gent2324
great thanks, is there an easy way i can find out if a metal is more / less reactive than hydrogen? (electrolysis)


look in the data booklet

If it's not given, you should really just remember the specific cases you need to know.
(edited 6 years ago)
Original post by have
look in the data booklet

If it's not given, you should really just remember the specific cases you need to know.


what do you mean by data booklet? (gcse)
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Original post by Gent2324
what do you mean by data booklet? (gcse)


When I took my GCSE, it was given on the other side of the periodic table.

In your GCSE, it's probably not given. So you just learn the basic cases. Like hydrolysis of brine water makes Chlorine and Hydrogen etc.
Original post by HEPTAKE
What about the ions an element has? How do I find that out?


Metals form positive ions (cations) and lose the electrons on their outer shell
Non metals form negative ions (anions) and gain electrons so they have a full outer shell
Noble gases have a full outer shell already


The metals in group 1 lose 1 electron. Lithium ---> Li+
The metals in group 2 lose 2 electrons. Magnesium ---> Mg2+
Original post by Iwannabesmart
Metals form positive ions (cations) and lose the electrons on their outer shell
Non metals form negative ions (anions) and gain electrons so they have a full outer shell
Noble gases have a full outer shell already


The metals in group 1 lose 1 electron. Lithium ---> Li+
The metals in group 2 lose 2 electrons. Magnesium ---> Mg2+


what about all the transition metals? what group is that classed as?
Original post by Gent2324
what about all the transition metals? what group is that classed as?


They form cations as well

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