Chemistry A Final Exam | Questions with 100% Correct Answers | Updated & Verified

What describes metallic compounds? Select all that apply. - in a solid state, they usually conduct electricity they generally have high melting points Using the electron configuration, how many valence electrons does sulfur (S) have? HINT: Sulfur's atomic number is 16. - S: 1s222s222p663s223p44 Since there are two electrons in 3s and four electrons in 3p, there are six valence electrons. Oxygen has six valence electrons, and an electronegativity of 3.44. Calcium has two valence electrons and an electronegativity of 1.00. How can the octet rule be used to explain the bonding between them? - Oxygen needs access to two electrons to reach a full octet. Each calcium atom has two valence electrons that it prefers to lose to obtain a full octet. Therefore, one oxygen atom and one calcium atom complement each other and form an ionic bond.