4 The first energy level can hold a maximum of a) 1 electron b) 2 electrons c) 8 electrons d) 18 electrons

6 Each orbital can hold up to a) 1 electron b) 2 electrons c) 4 electrons d) 6 electrons

11 Which orbitals have dumbbell shapes a) s b) p c) d d) f

3 The quantum mechanical model describes electrons as a) Particles in circular paths b) Clouds of probability c) Stationary around the nucleus d) Moving randomly

1 Who proposed the quantum mechanical model of the atom a) Niels Bohr b) John Dalton c) Erwin Schrödinger d) JJ Thomson

2 In the Bohr model electrons move in fixed paths called a) Orbitals b) Orbits c) Clouds d) Fields

5 The second energy level can hold a maximum of a) 2 electrons b) 4 electrons c) 8 electrons d) 18 electrons

10 Which orbital is spherical in shape a) s orbital b) p orbital c) d orbital d) f orbital

9 The d subshell can hold a maximum of how many electrons a) 6 b) 8 c) 10 d) 14

12 What does the term principal energy level refer to a) The atom’s nucleus b) The shell number n c) The orbital’s shape d) The number of neutrons

8 The p subshell contains how many orbitals a) 1 b) 3 c) 5 d) 7

7 What are the types of subshells a) s p d f b) a b c d c) n l m s d) 1 2 3 4

13 The formula for the maximum number of electrons in an energy level is a) 2n b) n² c) 2n² d) n plus 2