Exploring the Atomic Structures of the First 20 Elements
Exploring the Atomic Structures of the First 20 Elements
Learning objective
Items in this lesson
Exploring the Atomic Structures of the First 20 Elements
Learning objective
Learning Objective
At the end of the lesson, you will understand the atomic structures and electronic configurations of the first 20 elements.
What do you already know about the atomic structures of elements?
Introduction to Atoms
Atoms are the basic building blocks of matter. They consist of protons, neutrons, and electrons.
Atomic Number
The atomic number is the number of protons in an atom’s nucleus and defines the element.
Mass Number
Mass number is the total number of protons and neutrons in an atom's nucleus.
Electron Configuration Basics
Electron configuration describes the distribution of electrons in an atom’s electron shells.
Periodic Table Overview
The periodic table arranges elements by increasing atomic number. Groups and periods help us understand properties.
Hydrogen and Helium
Hydrogen: 1s¹. Helium: 1s². These configurations reflect their position on the periodic table.
Lithium to Neon
Lithium to Neon: 1s² 2s² 2p⁶. Filled shells up to Neon provide stability.
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
