How do you get the valence electron?

Answer 1

Not really sure if this is a positive answer but my science teacher told me to look at the Periodic Table and look at the group #. For example, Lithium is in Group 1 so it has 1 valence elctron.

Answer 2

the most number of valence electrons that an element can have is 8. Determine the number of electrons based on the position of elements in the 8 main groups of the Periodic Table: Group 1, 2, 13, 14, 15, 16, 17, and 18. Group 1 elements have 1 electron, and the elements placed into Group 18 have 8 electrons. Or Write the electron configuration. For example, Hydrogen is 1s1( this # 1 should be written as a superscript or an exponent); Helium 1s2( this # 2 should be written as a superscript or an exponent); Sulfur 1s2,2s2,2p6,3s2,3p4 Then use the exponents for the s or s and p of the highest energy level (the coefficient). Add them together to determine the number of valence electrons. Hydrogen has 1 valence electron, Hydrogen is also in Group 1 Helium has 2 valence electrons, although helium appears to be placed into group 18. Read about the amount of energy levels and electron rules. Sulfur has the highest energy level (the coefficient) = 3. The 3 has a s and a p with an exponent attached to it. The s has 2 and the p has 4. Add 2 + 4= 6 valence electrons for sulfur.

Answer 3

By looking at the group number... For the groups labeled with a B, if I remember the group number doesn't always tell how many valence electrons are in each atom, but in the groups labeled A it's a definite.

So just look at the group numbers and you'll be fine. :-P

Answer 4

each period (row) on a periodic table represents the outermost ring of electrons (valence electrons). Well if you count across a period you will get the number of valence electron. For example, if you count across a period for Oxygen (O atomic number:8) you will count 6 which is the amount of valence electrons in oxygen

Answer 5

write the complete electronic configuration of the atom following Aufbau principle