Exploring Electron Configurations

What question are we exploring in relation to the periodic table?

• How do elements form covalent bonds?

• Why do elements have different colors?

• What does the periodic table indicate about the arrangement of electrons?

• How are elements arranged by atomic mass?

What is the maximum number of electrons that the second energy level can hold?

• 32

• 18

• 8

• 2

How many subshells are there in the third energy level?

• 1

• 4

• 3

• 2

According to the Aufbau principle, where do you start filling electrons in an atom?

• Random energy level

• Middle energy level

• Lowest energy level

• Highest energy level

How many electrons can the 2p subshell hold?

• 8

• 6

• 2

• 4

What is the electron configuration for helium?

• 2p2

• 2s1

• 1s1

• 1s2

Which subshell is filled after the 3p subshell?

• 3f

• 4p

• 4s

• 3d

Why does the 4s subshell fill before the 3d subshell?

• It is higher in energy

• It has more electrons

• It is closer to the nucleus

• It is lower in energy

What is the electron configuration shorthand for arsenic using the noble gas notation?

• [Kr] 4s2 3d10 4p3

• [Ne] 3s2 3p6 4s2 3d10 4p3

• [Ar] 4s2 3d10 4p3

• [He] 2s2 2p6 3s2 3p6 4s2 3d10 4p3

What do the superscripts in electron configurations represent?

• Number of electrons in each subshell

• Number of protons

• Number of neutrons

• Number of energy levels