Create an account
4 phase of matter is plasma 4 points
1-most common phase in the universe but not common on earth, 2-extreamly high energy, 3-very colorfull, 4-found in stars, lightning, hottest part of a flame, TV's, norther lights
gives off energy from H to low, fire/explosion/heat, products have less energy than reactants (candle)
takes in evergy, gets colder, producst have more energy than reactants, "instant ice packs"
any property that can be tested without changing the chemical makes up like, color, shape, texture, melting/boiling point, mass
property that can only be tested by changeing the chemical makeup, involves energy, like rust, or fire
observation to indicate a chemical change
bubbles, color, soil forming in solution, change in temp, light
there are 90 natural elements on eather, more in the univers, and 40 on earth are in elements form
diatomic and 7 examples
when two atoms form togeather the 7 examples are: nitrogen, oxygen, fluorine, chlorine, bromine, and iodine
allotropes and example
one of the different molecular forms of an element. oxygen has two allotropes, O2 (oxygen) that we breath and O3 (ozone) which are 3 oxygens which make up the ozone layer
2) Separating elements/atoms
They cannot be separated through chemical/physical means, only a nueclear reaction
4) Where does the energy come from in exothermic reactions
The bonds or energy holding the reactants together, the new substances needs less energy to hold the bond so energy in released into the environment (heat, gas, ect)
5) How do endothermic reactions work with energy
More energy in needed to hold the new bond together, so energy is aborbed from the environment, making it feel colder, b/c the heat or energy is put in bonds which leaves the cold
9) Physical changes
Going from a solid to liquid and a liquid to a gas you have to add energy, going in the opposite you have to take away energy, since there is no cold energy
10) Absolute zero
Is when all motion in a solid stops, and the atoms are not moving which happens at -273'C
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together