Atomic basics
What is an atom?
The smallest particles that make up a substance
This particle has a negative charge.
Electron
Thomson’s model of the atom is often called this dessert.
Plum pudding
What is a molecule?
2 or more atoms chemically combined
This part of the atom contains protons and neutrons.
Nucleus
What is the name of the model we use to explain the structure of the atom today
Bohr's model/Planetary model
Name the 3 subatomic particles
Protons, neutrons, electrons
Electrons move around the nucleus in this region.
Shell/Orbit
This scientist discovered the nucleus with the gold foil experiment.
Ernest Rutherford
What is the relative mass of a proton
1
Why is Bohr's model also called the planetary model?
Electrons orbit the nucleus like planets orbit the sun
This ancient Greek thinker first suggested matter is made of tiny indivisible particles.
Democritus
What is the relative mass of an electron
1/1840 / 0
What did Chadwick discover?
The nucleus contained two types of particles, the second particle was called the neutron