How can I determine the number of valence electrons there are in a molecule?

Author Question: How can I determine the number of valence electrons there are in a molecule? (Read 724 times)

futuristic

Hero Member
Posts: 638

on: Sep 20, 2013

Referring to the periodic table?
Is it true that the number of valence electrons = the last digit of the group number they belong to?

So C (carbon) would have four valence electrons since it belongs to group 14 right?

notis

Hero Member
Posts: 596

Reply #1 on: Sep 20, 2013

Yes, but that only works for groups 1-2, and 13-18.

Need homework help now?

Ask unlimited questions for free

Ask a Question

« previous next »

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.