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 750 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?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.