In Search of Negatives

What makes up the electron configuration of certain atoms?

• energy levels

• number of electrons

• orbitals/sublevels

• all the three

What is the correct electron configuration of F atom with 9 electrons?

• 1S² 2S² 2P⁵

• 1S² 2S² 2P⁶

• 1S² 2S² 2P⁶ 3S¹

• 1S² 2S² 2P⁵ 3S²

The following sets of quantum numbers are possible except one. What set is INVALID?

• 𝑛 = 1; 𝑙 = 0; 𝑚𝑙 = 0; 𝑚𝑠 = + 1 /2

• 𝑛 = 3; 𝑙 = 3; 𝑚𝑙 = -2; 𝑚𝑠 = + 1/2

• 𝑛 = 2; 𝑙 = 1; 𝑚𝑙 = −1; 𝑚𝑠 = − 1/2

• 𝑛 = 2; 𝑙 = 1; 𝑚𝑙 = +1 ; 𝑚𝑠 = - 1/2

Chlorine atom is a member of a Halogen family/Group VIIA. How many valence electrons does a chlorine atom have?

• 1

• 3

• 5

• 7

Heisenberg's Uncertainty Principle helps us describe the probable location of an electron. What does this principle suggest?

• Electrons are inside the atoms.

• Electrons can be found in orbits around the nucleus.

• Electrons’ location cannot exactly be pointed out; however, the probability of finding it in orbitals is possible.

• Electrons have definite locations outside the nucleus