According to bohr's model of the hydrogen atom, what determines the energy of an electron?

a. the radius of its orbit
b. the direction of its orbit
c. the stability of its orbit

Which type of reaction always has an element and a compound as reactants

Ineed ! it’s science and it’s due tomorrow!

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