How many valence electrons does Barium, Lead, Xenon, and Potassium have?

Answer 1

Barium (Ba)- 2
Lead (Pb)- 6
Xenon (Xe)- 8
Potassium (K)- 1

Answer 2

Xenon Valence Electrons

Answer 3

Barium Valence Electrons

Answer 4

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RE:
How many valence electrons does Barium, Lead, Xenon, and Potassium have?

Answer 5

Check their atomic number on the table of periodic elements: http://en.wikipedia.org/wiki/Periodic_table

The atomic number is the number of protons in an atom. The number of electrons are identical, unless the atom is an ion in which case it has more or less electrons and carries an electrical charge. Isotopes have a different number of neutrons.


Barium: Barium (IPA: /ˈbɛːɹiəm/) is a chemical element. It has the symbol Ba, and atomic number 56.
Lead: Lead (IPA: /lɛd/) is a chemical element in the periodic table that has the symbol Pb (Latin: plumbum) and atomic number 82.
Xeon: Xenon (IPA: /ˈzɛnɒn, ˈziːnɒn/) is a chemical element that has the symbol Xe and atomic number 54.
Potassium: Potassium (IPA: /pə(ʊ)ˈtasiəm/, /pə'tæsiəm/) is a chemical element. It has the symbol K (Arabic: al qalja → Latin: kalium) and atomic number 19.

Answer 6

So first you have to look at their outer shells...

Xenon- it's a noble gas and thus is full. It has no valence electrons.

Barium- is [Xe]6s^2. There are only two electrons allowed in the s-orbital and it is full so no valence electrons.

Potassium- is [Ar]4s^1. To complete the s-orbital it needs one more electron. One valence electron.

Lead- is [Xe] 4f^14 5d^10 6s^2 6p^2. The p-orbital needs 6 electrons to complete the orbital so it has 2 valence electrons and needs four more.

Answer 7

What column are they in? I think it's 6 or 7?

Answer 8

http://www.youtube.com/watch?v=IUOylIeiXFk