Electron Theory Flashcards
(14 cards)
What are the three main parts of an atom?
Proton
Neutron
Electron
What is in the nucleus?
Protons and Neutrons
What charges do the internal particles of a nucleus hold?
Neutron-neutral
Proton-positive
What is an electron?
A subatomic particle that has a negative charge of -0.1602x10^-18. It also orbits the nucleus in energy levels.
What shell has 18 electrons?
3
n=3
2n^2 = 2x3^2 = 18
What is a positively charged ion?
Cation
The flow of electrons, is what?
Current
What is a negatively charged ion?
Anion
What is a molecule?
It is a particle which consists of two or more atoms chemically joined together.
What is a compound?
Is two or more different atoms chemically joined together
What are the 4 types of compounds and how are they held together?
- molecules held together by covalent bonds
- ionic compounds held together by ionic bonds
- intermetallic compounds held together by metallic bonds
- certain complexes held together by coordinate covalent bonds
What are conductors?
Materials that allow flow of electrons easily and they must have less than 4 electrons in the valence shell?
What happens to an atom which loses an electron?
It becomes positive
What happens to an atom when it gains an electron?
It becomes negative
