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MT
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Post subject: [ALMADEN][8th GRADE][SCIENCE]Science Test  Posted: Sun Jan 06, 2008 8:29 pm |
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Joined: Fri Jan 04, 2008 6:58 pm
Posts: 66
Location: CA
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Chapter 11: Chemical BondsTest Day: January 9th, 2008 (Wednesday) No. of Points: UNKNOWN Quote: Chapter Summary- The properties of compounds are generally different from those of the elements they contain.[/*:m:6cyr1c4i]
- A chemical formula for a compound indicates the composition of a unit of the compound.[/*:m:6cyr1c4i]
- Chemical bonding occurs because atoms of most elements become more stable by gaining, losing, or sharing electrons.[/*:m:6cyr1c4i]
- Atoms like having 8 electrons in the outermost shell.[/*:m:6cyr1c4i]
- Ionic bonds between atoms are formed by the attraction between ions. Covalent bonds are formed by the sharing of electrons.[/*:m:6cyr1c4i]
- Ionic bonding produces charged particles called ions. Covalent bonding produces units called molecules.[/*:m:6cyr1c4i]
- The unequal sharing of electrons produces compounds that contain polar bonds, and the equal sharing of electrons produces nonpolar compounds.[/*:m:6cyr1c4i]
- An oxidation number indicates how many electrons an atom has gained, lost, or shared when bonding with other atoms.[/*:m:6cyr1c4i]
- In the formula of an ionic compound, the element or ion with the positive number is written first, followed by the one with the negative oxidation number.[/*:m:6cyr1c4i]
- The name of a binary compound is derived from the names of the two elements that compose the compound.[/*:m:6cyr1c4i]
- A hydrate is a compound that has water chemically attached to its ions and written into its formula[/*:m:6cyr1c4i]
Additional Things: UNKNOWN. Discuss about the test; ask questions, etc.
_________________ ~MT  Administrator
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Kai
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Post subject: Re: [ALMADEN][8th GRADE][SCIENCE]Science Test Posted: Mon Jan 07, 2008 5:05 pm |
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Joined: Sun Jan 06, 2008 5:54 pm
Posts: 78
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For those of us who are having problems, can you explain how to balance binary compound equations?
...Thanks.
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Diane
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Post subject: Re: [ALMADEN][8th GRADE][SCIENCE]Science Test Posted: Mon Jan 07, 2008 8:11 pm |
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Joined: Sun Jan 06, 2008 7:56 pm
Posts: 28
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Give me an example of a binary compound equation you don't understand and I'll help =)
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Sophia
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Post subject: Re: [ALMADEN][8th GRADE][SCIENCE]Science Test Posted: Wed Jan 09, 2008 9:49 pm |
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Joined: Wed Jan 09, 2008 8:09 pm
Posts: 125
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thanx for the science help...^_^ i actually looked at it
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Sophia
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Post subject: Re: [ALMADEN][8th GRADE][SCIENCE]Science Test Posted: Thu Jan 10, 2008 6:31 pm |
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Joined: Wed Jan 09, 2008 8:09 pm
Posts: 125
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another thing....y'd u skip school today mingtao??? to skip the science test...???
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MT
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Post subject: Re: [ALMADEN][8th GRADE][SCIENCE]Science Test Posted: Thu Jan 10, 2008 6:39 pm |
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Joined: Fri Jan 04, 2008 6:58 pm
Posts: 66
Location: CA
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first off sophia, don't double post (posting two times in a row). Use the EDIT button. Second, no, i was sick
_________________ ~MT Administrator
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Jonathan
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Post subject: Re: [ALMADEN][8th GRADE][SCIENCE]Science Test Posted: Thu Jan 10, 2008 6:56 pm |
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Joined: Tue Jan 08, 2008 8:48 pm
Posts: 73
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lol
stephen said u skip school sometimes just so u dont hav 2 take a test.
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Vi
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Post subject: Re: [ALMADEN][8th GRADE][SCIENCE]Science Test Posted: Thu Jan 10, 2008 7:43 pm |
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Joined: Sun Jan 06, 2008 10:51 pm
Posts: 90
Location: CALIFORNIA <3
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ha i remember that! 
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I <3 MIAMI HEAT!!!!!
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Sophia
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Post subject: Re: [ALMADEN][8th GRADE][SCIENCE]Science Test Posted: Thu Jan 10, 2008 8:50 pm |
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Joined: Wed Jan 09, 2008 8:09 pm
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first off i'm sorry for double posting...i'm still trying 2 get used to this whole tauq website...and second of all stephen did mention today that i bet u anything, mingtao skipped school to avoid the science test. he even mentioned that u skipped the math test on the last day of school before winter break becuz u didn't do the h.w. or study..........
so u were sick...well that stinks...
^_^
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Jonathan
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Post subject: Re: [ALMADEN][8th GRADE][SCIENCE]Science Test Posted: Thu Jan 10, 2008 9:03 pm |
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Joined: Tue Jan 08, 2008 8:48 pm
Posts: 73
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lol i wish i could stay home from school... 
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