Chemistry: Quiz: Valence Electrons

Quiz: Valence Electrons

1. Valence electrons are located in

a. energy levels closest to nucleus

b. all energy levels

c. energy levels with the highest energy

2. When all the electrons in an atom are located in the lowest energy levels and sublevels, the electrons are

a. in an excited state

b. in the ground state

c. in a state of chaos

3. Which of the following elements would be expected to form an ion with a +1 charge?

a. Li: 1 s²2 s¹

b. F: 1 s²2 s²2 p⁵

c. Ne: 1 s²2 s²2 p⁶

4. When forming a positive ion, electrons are lost from which level?

a. the level closest to the nucleus

b. the level farthest from the nucleus

c. any level within the electron cloud

5. Which represents an excited state electronic configuration of electrons?

a. 1 s²2 s²3 s²

b. 1 s²2 s²2 p¹

c. 1 s²2 s²2 p⁶3 s¹

6. Isoelectronic ions are ions that have

a. different numbers of electrons

b. two extra electrons

c. the same number of electrons

7. Which electron configuration represents the fluoride ion, F^1–?

a. 1 s²2 s²2 p⁵

b. 1 s²2 s²2 p⁶

c. 1 s²2 s²2 p⁴

8. Which electron configuration represents an atom with its electrons in the ground state?

a. 1 s²2 s²2 p⁵3 s¹

b. 1 s²2 s²2 p⁵3 s²

c. 1 s²2 s²2 p⁶3 s¹