Molekuli valem

Erinevad molekulid

Lahenda teadmiste kinnistamiseks järgmised harjutused.

1. Kas tegemist on aatomi või molekuliga? Ca ......................., Co ......................,

CO .............................., KI ..............................., SO2 ......................................,

Cu .............................., S .................................., NaCl ....................................,

CaSO4 ......................................, Ag .................................................

2. Millistest elementidest ja millises vahekorras koosnevad järgmised molekulid? Kuidas sa neid loed?

CuCO4 ..............................................................................................................

..........................................................................................................................

CH4 ..................................................................................................................

H4SiO4 ..............................................................................................................

..........................................................................................................................

HCl ...................................................................................................................

3. Täida tabel

Valem Aatom või molekul Elementide arv Elementide vahekord Valemi lugemine

H2O

molekul

2

2 vesiniku ja 1 hapniku aatom

haa kaks oo

Na

       

CO2

       

3Co

       

HNO3

       

CaCl2

       

Fe