Atomic Components Flashcards
1
Q
Define element.
A
A substance made of just one type of atom.
2
Q
Define compound.
A
A substance made of different types of atoms.
3
Q
Define isotope.
A
Atoms that have the same number of protons but different numbers of neutrons.
4
Q
Define mixture.
A
A substance that is made of different atoms that can be separated.
5
Q
Name 3 important people who contributed in the development of the atomic theory.
A
- Werner Heisenberg
- Ernest Rutherford
- Niels Bohr
6
Q
Define half life.
A
The time it takes for half the nuclei to decay.
