For this problem two generic elements "X" and "Z" are going to combine to form an ionic compound. If the element X has 2 valence electrons and the element Z has 6 valence electrons, what is the chemical formula for the lonic compound they would create?
а) X2Z2
b) X6Z2
c) XZ6
d) XZ

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

How does the value of the equilibrium constant show that a reaction reaches equilibrium very quickly? (a) the equilibrium constant is large. (b) the equilibrium constant is small. (c) the equilibrium constant is zero. (d) the value of the equilibrium constant does not show how quickly a reaction comes to equilibrium.