Luokat: Kaikki - molecules - ions - atom - matter

jonka chua sonya 17 vuotta sitten

201

molecules and ions

molecules and ions

molecules and ions

atom

structure
No. P+ No.N = mass no

weight average mass of an element

No.P = No. E
P+E = nucleus
nuetron (N)

charge 0

electron (E)

charge -1

surround nucleus

proton (P)

charge +1

smallest particle in element

isotope

different no of electron
atom
different mass no
same atomic no

matter

pure substance
smallest particle found

molecule

form from covalent bonding

sharing of electron

cannot be separated bt phy method

cannot be decomposed by chem process

compound

constant composition

element combine chemically

differ from constituent element

can be from by ionic bonding

transfer of electron

can be decomposed by chem process

element

mixture
can be separated by phy method

uniform

homogenous

not uniform

heterogenous