Subatomic Particles
All matter is made up of _______________?
Atoms
Location of neutrons within an atom
what is in the nucleus
What is an atomic model?
A model that we use to study atoms
What is an atom?
The smallest unit of matter that maintains the properties of a substance
Where are protons located in an atom?
inside the nucleus
True or False: Atoms make up everything, including air!
True!
Which subatomic particle has the smallest mass?
electron
Why do we study atomic models and not real atoms?
Atoms are too small!
What is a proton?
Positively charged particle that lives in the nucleus. Weighs 1amu
This is a negatively charged subatomic particle
What is an electron
What are the two locations in an atom?
Nucleus and Electron Cloud
What do we call the three small particles that make up atoms?
subatomic particles
What did Democritus do?
First idea of the atom!
What is an electron?
Negatively charged particle that lives outside the nucleus in the electron cloud. Weighs 1/1836amu
Which two subatomic particles make up most of an atom's mass?
protons and neutrons
Why has the Atomic model changed over time?
Advancing technology, our understanding of models has changed
What is a neutron?
Particle with no charge that lives inside the nucleus and has a mass of 1amu
How much mass does an electron have?
1/1836 amu!
An atom is mostly ______________ ?
empty space
What are the masses of each subatomic particles?
Proton - 1amu
Neutron - 1amu
Electron - 1/1836amu
Name three scientists who contributed to the Atomic model
Democritus
Dalton
Thomson
Rutherford
Bohr
What does AMU stand for?
Atomic Mass Unit