BRAINLIEST TO CORRECT FASTTT 3. Which of the following atoms would have the highest first ionization energy?
a. Li
b. Be
c. Na
d. Mg

4. What is the name of the phenomenon in which electrons are ejected from the surface of a metal when light shines on the metal?
a. Photoelectric effect
b. Diffraction
c. Quantization
d. Aufbau principle

10. How many core electrons does this element have? 1s2 2s2 2p5
a. 9
b. 4
c. 2
d. 5

11. The electron configuration for a chlorine atom is: 1s2 2s2 2p6 3s2 3p5. What electron configuration represents the electrons that make up only the valence electrons for a chlorine atom?
a. 1s^2 2s^2 2p^6
b. 3s^2 3p^5
c. 1s^2
d. 1s^2 2s^2 2p^6 3s^2