[marshmallow_x3]

hi !
im new in this forum. i live in germany, but go to an billingual school (:
im a loser in chemistry, and would be soo glad if u could help me. thank u so much.

1. the following 2 elements are giving: chlorine/hydrogen/potassium.
combine the three elements so that you have got
a) a non-polar bond
b) a polar covalent bond
c) an ionic bond

soo now i've got as answers: a) hydrogen, H-H
b) Chlorine-Hydrogen
...i dunno c.
but is the rest right ??

and 2) name three typical properties of yr substance and three properties of either yr polar molecular substance or your nonpolar molecular substance.
??
Pleeaase, help me.
Thank u<3

[cliverlong]

1. the following 2 elements are giving: chlorine/hydrogen/potassium.
combine the three elements so that you have got
a) a non-polar bond
b) a polar covalent bond
c) an ionic bond

soo now i've got as answers: a) hydrogen, H-H
b) Chlorine-Hydrogen
...i dunno c.

Well, you have answered a and b correctly, so there aren't many possible combinations left of the 3 elements: chlorine/hydrogen/potassium.

So ...

Why are your first two combinations correct (the answer is in the title of your original posting)

What possible combinations are left that would make the bond ionic?

and 2) name three typical properties of yr substance and three properties of either yr polar molecular substance or your nonpolar molecular substance.
??
Pleeaase, help me.
Thank u<3

When I typed "polar molecule properties" into google the first 4 entries in the list were

http://en.wikipedia.org/wiki/Chemical_polarity
http://www.elmhurst.edu/~chm/vchembook/160Aintermolec.html
http://www.tutorvista.com/content/chemistry/chemistry-ii/chemical-bonding/polar-and-nonpolar-molecules.php
http://www.biology.arizona.edu/biochemistry/tutorials/chemistry/page3.html

all of which contain some information and explanation of the physical properties of polar molecules.

I suggest you try those and do a similar search for the properties of non-polar molecules.

Clive

[jsmith613]

1. the following 2 elements are giving: chlorine/hydrogen/potassium.
combine the three elements so that you have got
a) a non-polar bond
b) a polar covalent bond
c) an ionic bond

a) H2 (H-H) there are no poles as this is a NEUTRAL molecule AND HAS no charged ends
b) H-CL (HCl) THIS is polar AND covalent as it has charged ends H+ and Cl- AND it has a non-metal bonded to a non-metal
c) K-Cl (KCl) this is IONIC as it has a METAL bonded to a NON-METAL

2) name three typical properties of your substance and three properties of either your polar molecular substance or your nonpolar molecular substance.

what do you mean YOUR SUBSTANCE (which one)
PROPERTIES OF POLAR and NON-POLAR molecular substances

Polar
HCl forms a strong ACID when in solution (it is aquous Hydrogen Chloride)
HCl is a colourless gas at r.t.p
HCl has a high melting point relative to its size as a molecule
HCl (aq) reacts VERY well with Metals such as K, Na, Li, and Ca

Non Polar
H-H (H2) is a diatomic molecule
H2 is the lighest KNOW gas in the world
The test for H2 is a POP of a lit splint
H2 is a gas a r.t.p

KCl
KCl is a HALIDE salt
KCl is a white solid
KCl has a GIANT molecular structure
The ionic compound KCl will produce a LILAC flame during the flame test and WHITE precipitate in the HALIDE TEST with dilute HNO3 and AgNO3

I HOPE THIS HELPS (and hope that this is correct - hopefully other members will validate my answer)

[marshmallow_x3]

Thank you so much !
cliverlong, i took a look at those pages and it made me understand it easier. thanks !

and jsmith613, thank you so much for the explanation ! Now I really understand it.