chemistary Flashcards
1
Q
how many electrons can fill each layer
A
2.n2
2
Q
period
A
how many shells an element has outside the neclues.
3
Q
groups
A
tell you how many electrons in outermost layer/shell of atom
4
Q
alkali metals
A
shiny malleable very reactive explode when exposd to the water stored in inert gas or oil elctron un outer hell
5
Q
atomic number
A
number of protons neclues and electrons in outer shell layer
6
Q
a. m. u unfined
A
atomic mass unit or unifed when the atom is calm its mass is averaged at 1.67377 x 10 24
7
Q
zincing
A
matter can neither be v=created nor destoryed
8
Q
low of conversation mass
A
3 states solid liquid gas
9
Q
hyrdron
A
lightest gas known to the explosive flammibles colourless.
