name: q1 chemistry: u2l11 electron configuration day 1 date: teacher: schools: prepwork chemistry\nprepwork…

name: q1 chemistry: u2l11 electron configuration day 1 date: teacher: schools: prepwork chemistry\nprepwork part 1: electron configuration practice\ncomplete the ground state orbital energy level diagrams and write the corresponding electron configurations for all of the following elements:\n4. *magnesium 5. chlorine 6. **argon\nmagnesium: chlorine: argon:\n7. using what you know about orbital diagrams and the beginning of the orbital diagram below, create an orbital diagram for calcium. (hint: you may need to add boxes!)\nelectron configuration for calcium:\nreference the models on page 3 in your student handout to answer the following questions.\n8. **the lowest potential energy arrangement of electrons in an atom is called the ground state (how atoms are normally found). ground state electron configurations can be predicted by a strict set of rules; one is known as the aufbau principle (\aufbau\ means filling up). examine the diagrams in the model and the statements below to determine the phrase that best describes each rule. circle the correct answer.\na. *based on where a single electron is placed, the lowest potential energy electron in an atom is found in the ______ sublevel.\n1s 2s 3s

name: q1 chemistry: u2l11 electron configuration day 1 date: teacher: schools: prepwork chemistry\nprepwork part 1: electron configuration practice\ncomplete the ground state orbital energy level diagrams and write the corresponding electron configurations for all of the following elements:\n4. *magnesium 5. chlorine 6. **argon\nmagnesium: chlorine: argon:\n7. using what you know about orbital diagrams and the beginning of the orbital diagram below, create an orbital diagram for calcium. (hint: you may need to add boxes!)\nelectron configuration for calcium:\nreference the models on page 3 in your student handout to answer the following questions.\n8. **the lowest potential energy arrangement of electrons in an atom is called the ground state (how atoms are normally found). ground state electron configurations can be predicted by a strict set of rules; one is known as the aufbau principle (\aufbau\ means filling up). examine the diagrams in the model and the statements below to determine the phrase that best describes each rule. circle the correct answer.\na. *based on where a single electron is placed, the lowest potential energy electron in an atom is found in the ______ sublevel.\n1s 2s 3s

Answer

Explanation:

Step1: Recall electron - filling rules

We use the Aufbau principle (fill orbitals from lowest to highest energy), Pauli - exclusion principle (each orbital can hold 2 electrons with opposite spins), and Hund's rule (electrons occupy degenerate orbitals singly first).

Step2: Determine electron numbers

Magnesium (Mg) has 12 electrons, Chlorine (Cl) has 17 electrons, Argon (Ar) has 18 electrons, and Calcium (Ca) has 20 electrons.

Step3: Write electron configurations for Mg

Starting with the lowest energy level: 1s²2s²2p⁶3s².

Step4: Write electron configurations for Cl

1s²2s²2p⁶3s²3p⁵.

Step5: Write electron configurations for Ar

1s²2s²2p⁶3s²3p⁶.

Step6: Write electron configurations for Ca

1s²2s²2p⁶3s²3p⁶4s².

Step7: Answer question 8a

The lowest potential energy electron in an atom is found in the 1s sublevel as it is the lowest - energy orbital according to the Aufbau principle.

Answer:

Magnesium: 1s²2s²2p⁶3s² Chlorine: 1s²2s²2p⁶3s²3p⁵ Argon: 1s²2s²2p⁶3s²3p⁶ Calcium: 1s²2s²2p⁶3s²3p⁶4s² 8a. 1s