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 number of valence electrons an atom has is determined by its group number on the Periodic Table. For main group elements, the group number indicates the number of valence electrons. For example, elements in Group 1 have 1 valence electron, those in Group 2 have 2 valence electrons, and so on.

Answer 3

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 4

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 5

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 6

write the complete electronic configuration of the atom following Aufbau principle