How many electrons are in the element oxygen?
8
The positive particles of an atom are...
protons
A particle that moves around the nucleus is a(n)...
electron
What does the nucleus consist of?
Protons and neutrons
What is the basic building block for all matter in the universe?
atom
"C" is the element symbol for which element?
Carbon
The central region of an atom where its neutrons and protons are is its...
Nucleus
What are the 3 particles that make-up an atom?
Protons, neutrons and electrons
The electron was discovered in 1897. Who discovered it, Thompson or Schrodinger?
Thompson
Who stipulated that electrons orbit the nucleus at fixed energies and distances?
Niels Bohr
How many protons are in the element sodium?
10
What is the number of protons that the element in this image contain?
7
An atom with atomic number 6 would have how many protons?
6
Electrons have what type of charge?
Negative
Democritus called the tiniest particles of matter "atomos", which is Greek for _____
indivisible, unbreakable
How many total electrons does carbon have?
6
The particle in an atom that is neutral and have no charge is...
Neutron
Who first proposed that everything in the world was made up of tiny particles, Dalton or Democritus??
Democritus