Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
homogeneous |
same composition throughout |
|
heterogeneous |
different substances that remain physically separate |
|
precision |
closeness to one another in a series of measurements |
|
accuracy |
how close measured result is to true value |
|
uncertainty |
+- & fill all numbers with zeros and add 5 at the end |
|
Cº to K |
ºC + 273.15 |
|
K to ºC |
K - 273.15 |
|
ºF to C |
(5/9)(ºF-32) |
|
ºC to ºF |
(9/5)(ºC+32) |
|
Density |
Mass/ Volume |
|
Heat |
Specific heat J/gºC x mass g x T ºC |
|
1 kJ |
1000 J |
|
Law of Conversion of Matter |
When chemical reaction takes place, matter is neither created no destroyed, it just goes from one form to another |
|
Law of Constant Composition |
MULTIPLE samples of any pure chem compound always contain the same percent by mass of ea element making up the compound |
|
Atomic number |
#of protons = # of electrons |
|
Mass Number |
Protons + neutrons |
|
anion |
negative |
|
cation |
positive |
|
octet rule |
elements react to form compounds in such a way as to put 8 electrons in the outermost occupied valence shell |
|
Electron configuration |
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6, 4d10, |
|
ex |
tra |