Question

10 matching 3 points please match the electron - configuration to the correct element. 2 - 8 - 3 - 1, 2 - 8 - 17 - 6, 2 - 8 - 18 - 8, oxygen, copper, phosphorus
11 categorization 1 point please place the electron configurations into the correct category, either ground state or excited state. ground state: 2 - 6, excited state: no answers chosen, possible answers: 2 - 8 - 17 - 6, 2 - 7 - 6, 2 - 8 - 1 - 1, 2 - 8 - 3 - 1, 2 - 8 - 18 - 8, 2 - 8 - 18 - 1

Explanation:

Step1: Recall electron - configuration rules

The number of electrons in an atom is equal to its atomic number. The electron - configuration notation shows the number of electrons in each shell.

Step2: Match 2 - 8 - 3 - 1

The total number of electrons is \(2 + 8+3 + 1=14\). The element with atomic number 14 is Phosphorus.

Step3: Match 2 - 8 - 17 - 6

The total number of electrons is \(2 + 8+17 + 6=33\). This does not match the given options exactly, but if we assume it's a mis - write and consider the correct copper electron - configuration in a more common form, copper (\(Cu\)) has an atomic number of 29. A more typical electron - configuration for copper is \([Ar]3d^{10}4s^{1}\), but this format doesn't exactly match the given one. However, among the options, it's the closest to copper's complex electron - configuration behavior.

Step4: Match 2 - 8 - 18 - 8

The total number of electrons is \(2+8 + 18+8=36\), which does not match the given options. But if we consider the general trends, it's not a typical configuration for Oxygen, Copper or Phosphorus.

Step5: Categorize electron - configurations

• Ground state: Electrons are in the lowest energy levels possible. For 2 - 6 (oxygen's ground - state valence - shell configuration as oxygen has 8 electrons with full configuration \(1s^{2}2s^{2}2p^{4}\)), 2 - 7 - 6 is an excited state as the electron distribution is not in the lowest energy arrangement. 2 - 8 - 1 - 1 is an excited state as the second shell is filled (\(8\) electrons) and there is an extra electron in the third shell instead of filling the second shell completely first. 2 - 8 - 3 - 1 is a ground - state for an element with 14 electrons (Phosphorus). 2 - 8 - 18 - 8 is an excited state as it does not follow the normal filling order. 2 - 8 - 18 - 1 is a ground - state for an element with 29 electrons (Copper).

Answer:

10.
2 - 8 - 3 - 1: Phosphorus
2 - 8 - 17 - 6: Copper
2 - 8 - 18 - 8: (No correct match among given options)
11.
Ground state: 2 - 6, 2 - 8 - 3 - 1, 2 - 8 - 18 - 1
Excited state: 2 - 8 - 17 - 6, 2 - 7 - 6, 2 - 8 - 1 - 1, 2 - 8 - 18 - 8