What information on the periodic table is used to complete electron dot diagrams? the number before the a at the top of a column shows how many dots to draw in the diagram. the number before the b at the top of a column shows how many dots to draw in the diagram. the number at the left of each row shows the number of valence electrons that are in atoms of elements in that row. the number at the left of each row shows how many dots to draw above the symbol for elements in that row.

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

What is the difference between a substance "getting wet" and "being dissolved" in a liquid at the particulate level?