What is an atom?
An atom contains a positively charged nucleus of protons and neutrons surrounded by a cloud of negatively charged electrons. (2)
Atoms contain subatomic particles.
A single atom is NOT molecule.
Most of an atom is empty space. (2)
What size is an atom?
All atoms are roughly the same size, whether they have 3 or 90 electrons. (2)
What contains atoms?
molecules
chemical compounds
Resources
1. https://www.thoughtco.com/what-is-a-molecule-definition-examples-608506
2. https://www.britannica.com/science/atom
3. https://en.wikipedia.org/wiki/Subatomic_particle
