Question

And one more question.. Sorry, what is the criteria of matter (mass & volume)?

Answer 1

basically it means that something has stuff that makes it exist and takes up room

Answer 2

an elephant has a large mass a mouse little mass

Answer 3

I just know that I need to know this for a test... I was trying to find what it is exactly I need to know about this, but that was all the instructions I got for this.

Answer 4

and the same for volume an elephant and mouse elephant has large volume ( size ) and mouse small volume ( size )

Answer 5

So the criteria of matter is volume and mass? And volume takes up room?? I thought mass was the weight... :/

Answer 6

mass is sort of weight, but in space something still has mass but no weight

Answer 7

or think of piece of aluminium and a piece of gold, both the same size, one has more mass, the gold, but both have the same volume

Answer 8

No, mass is not weight. Mass is the amount matter contained in an object while weight is the force with which gravity pulls an object. Volume is defined as the amount of 3 dimensional space an object occupies.

Answer 9

And doesn't mass stay the same?? So volume is the size of an object? And mass is the amount of matter like all the space inside an object?

Answer 10

Yes, mass of an object always stays the same no matter what you do to it.

Answer 11

So yeah, I could have a square of aluminium and a square of gold, but because the gold is thicker and heavier it has more mass than the aluminium?

Answer 12

mass stays the same in space without gravity or on the ground in gravity, the thing is still made up of the same amount of stuff, it just weighs less or nothing

Answer 13

not thicker but denser

Answer 14

okay, denser, like heavier... right?

Answer 15

more stuff in the same amount of space makes something denser than something that has less stuff in the same amount of space

Answer 16

Yes that is basically the difference between mass and weight, mass remains constant whatever the situation but weight change with gravity.

Answer 17

heavier for the same size

Answer 18

and back to the Octet rule, when an energy level has eight electrons it's stable, right? Is that the rule? And when it has more than eight electrons it's unstable, right?

Answer 19

yes, or if it has less than eight its also unstable

Answer 20

Oooh Thank you guys!!!! I think I'm starting to understand it better!!!! I have an exam tomorrow and I need a tutor bad! It's a weekend class, so I have to teach myself to understand when I do the reading.. I really appreciate it!! There are soo many questions I have, but I won't burden you both with them! At least not yet, lol!

Answer 21

check out the first paragraph of this page...
http://en.wikipedia.org/wiki/Octet_rule

Answer 22

Yes, when an element has eight electrons in the outermost shell it is stable. And it is unstable if it has less than eight electrons in the outermost shell. And by the way, it cannot have more than eight electrons. For example if an element has 17 electrons, its electronic configuration will be 2, 8, 7. You can always reduce the number of electrons to less than eight in the outermost shell.

Answer 23

Thank you very much!! I think I understand now!