How many electrons must be shown in the Electron dot structure of an element in group 17?

A. 17
B. 9
C. 8
D. 7

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

What is the molar mass of potassium nitrate, kno3

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature