science Flashcards
potassium yttrium sulfur
element 1
hydrogen
element 2
helium
element 3
lithium
element 4
beryllium
element 5
boron
element 6
carbon
element 7
nitrogen
element 8
oxygen
element 9
fluorine
element 10
neon
element 11
sodium
element 12
magnesium
element 13
aluminum
element 14
silicon
element 15
phosphorus
element 16
sulfur
element 17
chlorine
element 18
argon
element 19
potassium
element 20
calcium
electron configuration for calcium
1s²2s²2p⁶3s²3p⁶4s²
OR
4s²
whats an atom
smallest unit in a thing
whats an elementussy
has to be the same type of atom
compound vs mixturussy
compounds have groups of molecules, each molecule can have different or the same type of atoms
mixture is like groups of other sht such as molecules/compounds that are different from each other