What is a double bond?
a. a bond between two atoms
b. one pair of electrons shared between two atoms
c. two pairs of electrons shared between two atoms
d. two pairs of electrons shared between four atoms

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Which substance has non polar covalent bonds