5 Questions
Which particles make up an atom?
Protons, neutrons, and electrons
What distinguishes one chemical element from another?
The number of protons in their atoms
What defines the isotope of an element?
The number of neutrons in its atoms
Why can't humans see atoms with conventional microscopes?
Atoms are too small to be seen
Where is the majority of an atom's mass located?
In the nucleus
Study Notes
Atomic Structure
- An atom is composed of three main particles: protons, neutrons, and electrons.
Chemical Elements
- One chemical element is distinguished from another by its unique number of protons in the atomic nucleus, known as the atomic number.
Isotopes
- The isotope of an element is defined by its unique number of neutrons in the atomic nucleus, which varies from one atom to another of the same element.
Atomic Visibility
- Humans cannot see atoms with conventional microscopes because the wavelength of visible light is too large to resolve the tiny size of atoms.
Atomic Mass
- The majority of an atom's mass is located in the nucleus, specifically in the protons and neutrons, which are much heavier than electrons.
Test your knowledge on the basic structure of atoms and the significance of protons in determining chemical elements. Challenge yourself with questions on atomic nuclei, electrons, and identifying elements based on their proton count.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
