Anyone Here Know About Elements?

POSTED BY: DarkHood
UPDATED: Thursday, June 3, 2004 18:38
VIEWED: 5932
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DARKHOOD

Friday, May 28, 2004 5:01 PM

Hey, I've been given a real ***** of homework and the answer isn't jumping out at me by doing searches on the net. Anyway I have to make element cards. They are basicly cards with information on them about one element. I have to do 4 in total and the questions I need answerd are:

No. of Protons
No. of Neutrons
No. of Electrons
Discoverd In
Discoverd By
3 Uses for the element

Any help would be appreciated.

________________________________________________________________________

Mal's on the ground, about to get speared by Crow. A shot rings out. Crow is kneecapped.

Mal: Nice shot.

Jayne: I was aiming for his head.

DARKARCHON

Friday, May 28, 2004 5:08 PM

I would say check your chemistry book.

-Dark

ARAWAEN

Friday, May 28, 2004 5:15 PM

Find a periodic table. The number of protons and electrons can be found for each element. I believe most tables will also tell you how many neutrons there are.

Arawaen

Um, I'm lost. Uh, I'm Angry. And I'm Armed.

SERGEANTX

Friday, May 28, 2004 5:35 PM

Better yet, find someone online who will do it all for you!

SergeantX

"Dream a little dream or you can live a little dream. I'd rather live it, cause dreamers always chase but never get it." Aesop Rock

BEATLE

Friday, May 28, 2004 5:39 PM

http://chemlab.pc.maricopa.edu/periodic/periodic.html

EST120

Friday, May 28, 2004 5:58 PM

in the age of the internet, i bet you can "google" all the answers you need.

HUMBLE

Friday, May 28, 2004 6:40 PM

My major pertains to this subject. However, where would the fun be if I just flat-out told you the answers? You should go to your instructor for extra help, research the info in your book or go to the library. You will no doubt be tested over this stuff later on, yes?

HUMBLE.

P.S.:Master the subject matter, don't let it master you!

RUE

Friday, May 28, 2004 9:33 PM

As before, Google on the periodic table.

*Each element* has its own specific number of *protons* (each w/ +1 charge) in the nucleus. That equals the number of electrons (-1 charge) orbiting the nucleus. Howver, some elements have more or less neutrons (0 charge) in the nucleus, and they are called isotopes of that element.

In the table, you'll see one smaller number - that is the number of protons, each with a mass of 1 (it was just decided that way).

The number of orbiting electrons is the same as the number of protons. However, electrons have so little mass, it's not counted in the total.

Neutrons have about the same mass as protons.

Atomic mass is proton mass (1) plus nuetron mass (~1) and electron mass not counted.

You'll see a larger number with decimal places afterwards. That is the atomic mass (~ weight). It relates to the *average* mass of the various isotopes of the element. (Just as an aside which may or may not be of interest to you, the distribution of isotopes is very much an Earthside distribution.)

Round that larger number to the nearest whole number to get around the difficulties of dealing with an average. Subtract the number of protons from 'molecular weight' to get the number of neutrons of the most common isotope.

Clear as mud?

RUE

Friday, May 28, 2004 9:39 PM

And for what it's worth, the people at NIST (National Institute for Standards and Technology - used to be NBS National Bureau of Standards) and others who have to make very, very fine measurements actually worry about getting an 'accurate' average mass on the elements, and whether or not that average has the same isotopic distribution as the particular thing they are measuring.

FIREFLYWILDCARD1

Friday, May 28, 2004 10:07 PM

Well there are at least 4 (maybe even as many as 10) elements that were named after the country they were discovered in. I think (but don't quote me on this) they are in the top row of the 2 rows that are at the bottom of a standard periodic table.

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