I need help with Chem...
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ok so i have to create ionic bonds with H, Li, Be, Na, Mg, K, and Ca. I know that with the Group 1 (H, Li, Na, K) elements, I can easily combine them with Cl. But what about the Group 2 (Be, Mg, Ca) elements? What can I use there?
For a while I thought I had to use specific elements for all of these, but are there specifics for the Group 2 elements to bond with?
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perhaps O (oxygen) ?
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Ow .. Pain . I only on Sec 2 Chem so cant help . Give you free bump ;D
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I've tried googling some stuff, but that didn't help much.
I did find that Be is a (2+) cation, and that O is a (2-) anion. So can they form an ionic bond, or do they form a covalent bond or some other one?
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Originally posted by CJ:
I've tried googling some stuff, but that didn't help much.
I did find that Be is a (2+) cation, and that O is a (2-) anion. So can they form an ionic bond, or do they form a covalent bond or some other one?
Be and O form an ionic bond. ionic bond tend to be stronger than covalent coz ionic is solid while covalent is gas/volatile liquid at room temperature.
if you want to combine any Group II element with Cl to form strong bond, use Ra, because Ra is the most reactive one compared to Be,Mg,Ca,Sr, and Ba :)
hope that helps
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O can work, because O is a non-metal, and the group 2 elements are all metals, so they will form ionic bonds. Hope this helped :)
Im a part time tutor, need chem help pm me.
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I didn't know that about covalent bonds, so thanks!!!! But I had originally thought that covalent bonds were stronger than ionic bonds because it takes less energy to share the electrons than to take/lose an electron. (I'm not sure anymore...) And I also found out that the more energy needed to form an ionic bond, the stronger the bond is. I also found out that there is something clled Beryllium chloride, but I don't really know if it's an ionic bond or not. (I'm SO confused.)
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If you are just using the above mentioned elements( H, Li, Be, Na, Mg, K, and Ca), just use hydrogen to form any ionic compounds with the rest of the elements.
For example.
Calcium hydride is an ionic compound formed from 2 hydrogen atoms receiving 1 electron each from a calcium atom. It would look like this(sort of).
[H]-[Ca]2+[H]-
Anyway, hydrogen is not technically a group 1 element. So don't confuse it with the rest of the alkali metals.
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more like it is technically a grp 1 element but not a metal?
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ionic bond= Metal cation + non metal anion.
convalent bond = non metal atoms bonded thru sharing of electrons,
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Originally posted by CJ:
ok so i have to create ionic bonds with H, Li, Be, Na, Mg, K, and Ca. I know that with the Group 1 (H, Li, Na, K) elements, I can easily combine them with Cl. But what about the Group 2 (Be, Mg, Ca) elements? What can I use there?
For a while I thought I had to use specific elements for all of these, but are there specifics for the Group 2 elements to bond with?
u can also combine them with Cl i thought. CaCl2? -
ok, would it be easier to combine Be with I (iodine)? Or should I just stick with Chlorine?
Also, would the bond between Be and Cl have to be made at a high temperature since one is a solid and one is a gas? .........
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grp 2 can also form bonds with halogens, just tat 2 of which are needed
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I don't really know how to form the bonds with 2 elements. Explain?
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Originally posted by jesslyn1992:
Be and O form an ionic bond. ionic bond tend to be stronger than covalent coz ionic is solid while covalent is gas/volatile liquid at room temperature.
if you want to combine any Group II element with Cl to form strong bond, use Ra, because Ra is the most reactive one compared to Be,Mg,Ca,Sr, and Ba :)
hope that helps
so clever >.<
hahaha . 1 year more knowledge than me
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My guess is that they create a double reaction of some sort. Like the covalent bonds, only through the direct attraction of the anion to the cation. (?)
I found this chart:
Common Cations Stock System Name Formula Historic Name Simple Cations Aluminium Al3+ Barium Ba2+ Beryllium Be2+ Caesium Cs+ Calcium Ca2+ Chromium(II) Cr2+ Chromous Chromium(III) Cr3+ Chromic Chromium(VI) Cr6+ Chromyl Cobalt(II) Co2+ Cobaltous Cobalt(III) Co3+ Cobaltic Copper(I) Cu+ Cuprous Copper(II) Cu2+ Cupric Copper(III) Cu3+ Gallium Ga3+ Gold(I) Au+ Gold(III) Au3+ Iron(II) Fe2+ Ferrous Iron(III) Fe3+ Ferric Lead(II) Pb2+ Plumbous Lead(IV) Pb4+ Plumbic Lithium Li+ Magnesium Mg2+ Manganese(II) Mn2+ Manganous Manganese(III) Mn3+ Manganic Manganese(IV) Mn4+ Manganese(VII) Mn7+ Mercury(II) Hg2+ Mercuric Nickel(II) Ni2+ Nickelous Nickel(III) Ni3+ Nickelic Potassium K+ Silver Ag+ Sodium Na+ Strontium Sr2+ Tin(II) Sn2+ Stannous Tin(IV) Sn4+ Stannic Zinc Zn2+ Polyatomic Cations Ammonium NH4+ Hydronium H3O+ Nitronium NO2+ Mercury(I) Hg22+ Mercurous Common Anions Formal Name Formula Alt. Name Simple Anions Arsenide As3− Azide N3− Bromide Br− Chloride Cl− Fluoride F− Hydride H− Iodide I− Nitride N3− Oxide O2− Phosphide P3− Sulfide S2− Peroxide O22− Oxoanions Arsenate AsO43− Arsenite AsO33− Borate BO33− Bromate BrO3− Hypobromite BrO− Carbonate CO32− Hydrogen carbonate HCO3− Bicarbonate Chlorate ClO3− Perchlorate ClO4− Chlorite ClO2− Hypochlorite ClO− Chromate CrO42− Dichromate Cr2O72− Iodate IO3− Nitrate NO3− Nitrite NO2− Phosphate PO43− Hydrogen phosphate HPO42− Dihydrogen phosphate H2PO4− Permanganate MnO4− Phosphite PO33− Sulfate SO42− Thiosulfate S2O32− Hydrogen sulfate HSO4− Bisulfate Sulfite SO32− Hydrogen sulfite HSO3− Bisulfite Anions from Organic Acids Acetate C2H3O2− Formate HCO2− Oxalate C2O42− Hydrogen oxalate HC2O4− Bioxalate Other Anions Hydrogen sulfide HS− Bisulfide Telluride Te2− Amide NH2− Cyanate OCN− Thiocyanate SCN− Cyanide CN− But with so much information, it really wasn't too helpful. (Just the Be and O part, but that's about it...)
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woah that was chim enuff.
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Originally posted by CJ:
ok, would it be easier to combine Be with I (iodine)? Or should I just stick with Chlorine?
Also, would the bond between Be and Cl have to be made at a high temperature since one is a solid and one is a gas? .........
First you have to get your basics of the periodic table right first.
Halogens get less reactive as they go down the group. That means Fluorine is the most reactive non-metal element.
On the other hand, Alkali Metals (Grp 1) get more reactive as they go down the group.
There are no specific anions (non-metal ions) to bond with specific cations (metal ions). You can have NaCl, NaBr, NaI, CaCl2, CaBr2, CaI2... ...
Just some facts:
Covalent bonds BETWEEN MOLECULES (called intermolecular forces) are very weak but the covalent bonds WITHIN EACH MOLECULE are very strong. Do not confuse yourself with this.
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ok sorry about that, it was a chart (http://en.wikipedia.org/wiki/Ionic_bond#Substances_in_ionic_form)
haha, this is my first year in chemistry, so not much experience here! Plus, my teachers haven't exactly explained this.
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Then you have to wait till your school covers the chapters. Feel free to clarify any doubts that you have here while you are going through each chapter.
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^_^ Thanks a lot! Although this is homework for MONDAY, and my Biology book doesn't cover the homework, and my Chemistry book doesn't either (book for retards, I swear), so I had to get some online help, which was great, but still... i can't exactly wait, and the time on my hands is very limited (5 college classes and 1 AP class). Lots of homework, needs more sleep. _-_
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I don't really know how to form the bonds with 2 elements. Can someone explain this to me please?
If I was to take advice (If you are just using the above mentioned elements( H, Li, Be, Na, Mg, K, and Ca), just use hydrogen to form any ionic compounds with the rest of the elements. ), what should I do about H?
(Anything you might throw in would help lots. Even if it's just a "just use another H!" Although I don't think that's what I'm supposed to do... -_- )
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Actually what's the question huh?
As a general way of memorising, I usually ask my students to remember that non-metal and metal forms ionic bonds, while non-metals form covalent bonds with non-metals. But of cos this is way too generalising and there's exceptions.
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The question is "Ionize Groups 1 & 2 (to 20). Can they make covalent bonds?"
If someone can do this for me, great! Although it would be cheating... GREAT!
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Right, so you're from the U.S., but in a Singapore forum. I guess your education syllabus is a bit behind ours here. I'm 16 like you, and already completed four years in Chemistry (GCSE level). Trust me, Chemistry is the easiest out of the three sciences (Biology, Physics). It's only a matter of time before you master it.
To ionize them you simply write down the element alphabet with its valency. Pretty easy if you ask me. Only non-metals CAN make covalent bonds.
For example,
Na --> Na+
Ca --> Ca2+
You know the +, 2+ all stand for superscript right...
EDIT: Hang on, on a second look, I realized my mistake. Since it only says Grp 1 and 2, and both groups contain only metallic elements, then it is for you to deduce, can they form covalent bonds? Based on my paragraph above.
Anyways, I am not going to give away all the answers here, as the forum moderators don't permit. We prefer that you work out your doubts on your own first, then discuss the extent of your work. For instance, "I am stuck at..., require help to continue...", "Is this step right..."
Last but not least, enjoy your stay at SGF. I'm sure we're all happy to help.
As a last note, you may not understand the slangs we might use here. Feel free to ask.