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Covalent Bonds

Posted: Sun Oct 28, 2018 11:31 pm
by davidryan3f
This may be a dumb question but im a little confused. Can non metals form cations. if not, why can't they?

Re: Covalent Bonds

Posted: Sun Oct 28, 2018 11:41 pm
by 705192887
No such thing as a dumb question, David!! And, to answer your question, nonmetals (right side of periodic table) do not form cations because they only gain a few electrons to fill their octet, meaning they become anions. Metals, on the other hand, lose electrons to fill their octet. Hope this helps! I can give you a more detailed response if you would like! :)

Re: Covalent Bonds

Posted: Sun Oct 28, 2018 11:47 pm
by ElliotPourdavoud 1A
Non metals tend to gain an electron simply due to their valence electrons needing a small number of electrons to complete their octet rather than losing those electrons.

Re: Covalent Bonds

Posted: Mon Oct 29, 2018 12:04 am
by Ashley Kim
Nonmetals also tend to gain electrons more frequently due to their high electronegativity.

Re: Covalent Bonds

Posted: Mon Oct 29, 2018 12:38 am
by Manas Jinka
Nonmetals usually need a few electrons to complete a stable shell. Thus, they usually become anions.

Re: Covalent Bonds

Posted: Tue Oct 30, 2018 8:14 pm
by Nina Do 4L
Covalent bonds tend to share electrons to complete the octet rule which makes them anions.

Re: Covalent Bonds

Posted: Wed Oct 31, 2018 6:29 am
by Xingzheng Sun 2K
No, because metals tend to form cations and nonmetals tend to form anions.

Re: Covalent Bonds

Posted: Wed Oct 31, 2018 11:10 am
by Zubair Ahmed 1L
Just to reiterate, nonmetals(anions) cannot become cations due to their high electronegativity and lack of electrons in their valence shell. Nonmetals such as chlorine with 7 valence electrons only needs one more electron to complete their octet so they would attract other elements in giving up an electron to complete the octet instead of giving up one of their own electrons.

Re: Covalent Bonds

Posted: Thu Nov 01, 2018 3:23 pm
by Hannah Pham 1D
Non metals cannot form cations; instead, they form anions and metals form cations.

Re: Covalent Bonds

Posted: Thu Nov 01, 2018 5:31 pm
by George Ghaly 2L
Non metals generally do not become cations because they have a very high electron affinity therefore their ionization energies would be very high making it unlikely for them to lose an electron.

Re: Covalent Bonds

Posted: Thu Nov 01, 2018 6:53 pm
by Alyssa Wilson 2A
For example a covalent bond would be (H-H) they can either be polar/non-polar. Since ionization energies are too high, it will therefore form between nonmetals.

Re: Covalent Bonds

Posted: Fri Nov 02, 2018 2:13 am
by Henry Dudley 1G
If a metal bonds with a nonmetal is this considered a covalent bond?

Re: Covalent Bonds

Posted: Fri Nov 02, 2018 10:01 am
by Chloe Qiao 4C
Usually two non-metals bond to form a covalent bond, while a metal and a non-metal bond to form an ionic bond.

Re: Covalent Bonds

Posted: Fri Nov 02, 2018 12:10 pm
by Xinyi Zeng 4C
Henry Dudley 1I wrote:If a metal bonds with a nonmetal is this considered a covalent bond?


Usually the bond formed between a metal and a nonmetal is an ionic bond. But it may have a covalent character as the nature of the bond formed between two atoms really depends on the electronegativity between the two atoms that will bond together.
Take AlCl3 as an example, supposedly Al-Cl should be an ionic bond, but because Cl- is highly polarizable while Al3+ has a high polarizing power, the electron density existed between cation and anion becomes shared between them, and hence the Al-Cl bond takes a pretty strong covalent character, so it is actually considered as a covalent bond.

Re: Covalent Bonds

Posted: Sat Nov 03, 2018 11:51 am
by Esther Lee 4H
this is gonna sound really dumb too but it's easy to remember that cations lose electrons because its a "pawsitive" ion and an anion stands for "a negative ion"

Re: Covalent Bonds

Posted: Sat Nov 03, 2018 4:04 pm
by Nicolle Fernandez 1E
No, non-metals cannot form cations because they need to gain few electrons to complete the outer shell, so they become anions.

Re: Covalent Bonds

Posted: Sat Nov 03, 2018 4:13 pm
by Daniel Chang 3I
non-metals usually are the composition of covalent bonds and therefore share electrons to fill their outer shell and are anions from gaining and sharing electrons