10. Periodic Properties of the Elements

How many valence electrons are present in a molecule of H2S?

How many valence electrons does the element tin (Sn) have?

How many valence electrons does tellurium (Te) have?

Sulfur has an atomic number of 16. How many valence electrons does sulfur have in its outermost shell?

How many valence electrons does the S^{2-} ion have? (Hint: Write out the electron configuration of S^{2-}.)

Which of the following best describes a valence electron and its importance in chemistry?

Which of the following best defines valence in chemistry?

How many valence electrons are present in a molecule of CO_2?

Which of the following elements has more core electrons than valence electrons?

Where are the elements with the most valence electrons located on the periodic table?

Which of the following best explains why the valency of carbon is 4, even though it has 6 electrons?

Which of the following represents the number of valence electrons in an oxygen (O) atom?

Which of the following correctly states the number of valence electrons in H2S and provides the correct Lewis structure for the molecule?

How many valence electrons does the element lithium (Li) have?

How many valence electrons does an oxygen atom possess?