Question

Name the first 20 elements, symbols and valency

Answer 1

Answer:

Hydrogen , H , +1

Helium , He , 0

Lithium , Li , +1

Beryllium , Be , +2

Boron , B , +3,-3

Carbon , C ,

Nitrogen , N , -3

Oxygen , O , -2

Fluorine , F , -1

Neon , N , 0

Sodium , Na , +1

Magnesium , Mg , +2

Aluminium , Al , +3

Silicon , Si , +4,-4

Phosphorus , P , -3

Sulphur , S , -2

Chlorine , Cl , -1

Argon , Ar , 0

Pottasium , K , +1

Calcium , Ca , +2

Answer 2

Explanation:

QUESTION -

Name the first 20 elements , symbols and valency -

DEFINITION OF THEM -

ELEMENTS - The pure substance which is neither split or bent by its own kind of atoms.

SYMBOLS - The shorts words uses in the place for the full elements names can defined as symbol.

VALENCY - The number of electrons in the last orbits of element is its valency .

ANSWER -

HYDROGEN - H

HELIUM - HE

LITHIUM - LI

BERYLLIUM - BE

BORON - B

CARBON - C

NITROGEN - N

OXYGEN - O

FLUORINE - F

NEON - NE

SODIUM - NA

MAGNESIUM - MG

ALUMINUM - AL

SILICON - SI

PHOSPHORUS - P

SULPHUR - S

CHLORIDE - CL

ARGON - AR

POTASSIUM - K

CALCIUM - CA

VALENCY OF EVERY ELEMENTS CAN BE FIND BY THE LAST ORBITS ELEMENTS