Give the ground state electron configurations for the elements of Exercise 95 using shorthand no

step 1 Hi there. This is problem number 105. In problem 105, we are looking back at the elements given

Give the ground state electron configurations for the...

Key Concepts

Electron Configuration

This concept refers to the way electrons are arranged in the orbitals of an atom. It follows a specific order based on the energy levels and subshells available, and it is a fundamental part of understanding periodic trends, chemical reactivity, and bonding.

Ground State

The ground state is the lowest energy state of an atom, where electrons occupy the lowest available energy orbitals in accordance with the principles governing electronic structure. This state is significant because it represents the most stable configuration of electrons in an atom.

Shorthand or Noble Gas Notation

Shorthand notation involves representing the electron configuration of an element by using the electron configuration of the nearest preceding noble gas as a starting point. This method simplifies the process of writing electron configurations by condensing the core electrons into a symbol, thus highlighting only the valence electron distribution.

Aufbau Principle

The Aufbau principle is a guideline that helps predict the order in which electrons fill the orbitals in an atom. According to this principle, electrons occupy the lowest energy orbitals first before moving to higher energy ones, ensuring that the ground state configuration is achieved.

Transcript

00:02 Hi there.

00:02 This is problem number 105.

00:05 In problem 105, we are looking back at the elements given to us in problem 95, where we did the orbital notation, and we are now writing their electron configurations using the shorthand method.

00:18 So in the shorthand method, we put a noble gas in brackets to represent the core electrons, and then write out the configuration for all of the electrons past those core electrons.

00:31 So starting with, off we have flooring, which is atomic number nine.

00:36 So it has nine electrons and it is in group, i'm sorry, it is in period number two.

00:43 So the element that goes into the brackets is the noble gas from the period before that.

00:49 So that would be h .e.

00:51 So that represents the first two electrons since h .e is atomic number two.

00:56 So now we need to just work across that second period until we get to flooring.

01:02 In other words, 2s2, 2p5.

01:08 And this would be the shorthand electron configuration for flooring.

01:15 Let's go on to part b.

01:16 Part b, we have vanadium, which is number 23, and it is in group four.

01:25 So i look for the noble gas in group three, and that is argon.

01:36 So argon goes in brackets.