What does valence mean when u are talking about periodic table?

Question

I'm in 9th grade,Freshman. :P

I'm in 9th grade,Freshman.Needs homework help :P

Answer 1

Valence tells us how an element bonds with others. Examples:
alkali metals (group 1A) have valences of +1. This is because they have 1 electron in their outermost shells, & this electron can easily be "given" to another atom or ion, giving the resulting ion a charge of +1 for example sodium can lose an electron & go from Na to Na+. Elements in group 2a (alkali earths) have 2 electrons in their outer shells so Calcium can go from Ca to Ca+2. On the other side of the chart we have Group 7a- halogens. they have 7 electrons in their outer shells & will "steal" an electron from another element to become negative ions, example: chlorine will gain an electron & go fron Cl to Cl-. When sodium reacts with chlorine, the resulting compound is ionic. You have Na+ cations & Cl- anions.

Answer 2

valence means valence electrons or # og electrons on the outermost energy level for about the is 20 elements you just look at the group #
EX:
if ur element was in group 7 it would have 7 valence electrons, if it was in group 17 it would also have 7 valence electrons if in group 5 it would have 5, if in group 15 it would also have 5!

Answer 3

Valence refers to the outermost shell of an atom. Eg. valence electrons of oxygen atom would be refering to the 6 outermost shell electrons of the oxygen atom.

Answer 4

Chemistry combing power of atoms: the chemical combining form of atoms or groups measured by the number of electrons the atom or group will receive, give up, or share in forming a compound. also called atomicity