Reading...
Play button
Play button
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;
20 Cards in this Set
- Front
- Back
|
covalent bonds?
|
get stable by sharing an electron
|
|
|
can protons change?
|
no no no no no
|
|
|
can neutrons change?
|
yep, but would change mass. (there is no effect on charge)
|
|
|
can eletrons change?
|
yes but would cause a charge
|
|
|
whats a compound?
|
a substance composed of 2 or more elements that are chemically combined.
|
|
|
exothermia?
|
-gives off heat
-feels hot (body heat) |
|
|
two types of mixtures?
|
1.) hetergenenous mixture- easy to tell there is more than one substance. (ex. sand soup)
2.) homogeneeous mixture- diffult to tell if there is more than one substance. (ex. pudding) |
|
|
whats a element?
|
any substance that cant b broken down
|
|
|
atom-?
|
smallest part of matter building block of everuthing
|
|
|
whats a group?
|
column
|
|
|
isotopes?
|
atoms of the same element that have a different mass
|
|
|
what are the max. # of electrons in each NRG level?
|
1=2
2=8 3=18 4=32 5=32 6=18 7=8 |
|
|
whats a period?
|
rows
|
|
|
synthesis reaction?
|
2 or more element/compounds react to form one new compound (product)
|
|
|
ion?
|
atoms that have an electrical charge
|
|
|
endothermic?
|
-absorbs heat
-feels cold (cold pack) |
|
|
ionic bonds?
|
formed by tons (duh) involve electron transfer
~what will attract? metals (+) and non-metals (-) |
|
|
mixture-?
|
a substance composed of 2 or more elements that are not chemically bonded.
|
|
|
valence level
|
# of electrons in NRG level farthest away from the nucleus
|
|
|
how many NRG levels are there?
|
7
|
