Why do the elements of period 4 start a new cycle of properties after the element argon? Select all that apply.

- The electrons in the outermost energy level are primarily responsible for the properties of an element.

-The n = 3 energy level of argon is complete.

- Additional electrons after argon begin to fill a sublevel of the n = 4 energy level.

- All the energy levels of period 4 elements are less than period 3 because the amount of energy between energy levels decrease with distance from the nucleus.

Question

Chemistry

Anastasia Underwood

10 December, 17:33

Why do the elements of period 4 start a new cycle of properties after the element argon? Select all that apply.

- The electrons in the outermost energy level are primarily responsible for the properties of an element.

-The n = 3 energy level of argon is complete.

- Additional electrons after argon begin to fill a sublevel of the n = 4 energy level.

- All the energy levels of period 4 elements are less than period 3 because the amount of energy between energy levels decrease with distance from the nucleus.

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Answers (1)

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Curtis Wheeler · Answer 1

Elements in group four of the periodic table have 4 energy levels in their configuration. Argon is the last element in the period. In this case i believe, the electrons in the outermost energy level are primarily responsible for the properties of an element. Additional electrons after argon begin to fill a sub level of the n=4 energy level.