General Flashcards
(23 cards)
Everything (except light) is made out of extremely small, tiny bits called
Atoms
What do atoms do?
Atoms attach to each other, or bond together. Together, atoms make everything we know
Performed the Gold Foil Experiment
Ernest Rutherford
First found evidence that atoms exist
John Dalton
First came up with the idea of atoms
Democritus
Experimented with cathode Ray Tubes
JJ Thomson
First to realize the electrons can only orbit in specific locations called shells
Niels Bohr
First discovered electrons
JJ Thomson
Discovered the nucleus
Ernest Rutherford
Elements within the same group tend to share
Similar properties
How many valence electrons does Silicon have?
4
What is the total number of electrons that Calcium “wants” to have?
18
Gave us the first experimental evidence of that atoms exist with the Law of Multiple Proportions
John Dalton
First came up with the idea that atoms are tiny, uncuttable pieces
Democritus
Define Valence Electrons
An electron in the outer shell of an atom which can combine with other atoms to form molecules.
True or False
A scientific model is a simplified representation of something that can help you explain or understand what it represents. While you can use the model to make predictions, the model itself is never a perfect representation.
True
Reactant(s)
substance or compound that is added to a system in order to bring about a chemical reaction, or added to see if a reaction occurs
Ionic Bond
a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.
Ionic Compound
a chemical compound in which ions are held together in a lattice structure by ionic bonds.
Dissolve
Process of making 2 compounds into a homogeneous mixture
Solube
A substance that can dissolve in a given liquid (not always water)
Insoluble
Substance that can NOT dissolve in a liquid
Crystal
Material whose particles (atoms, models, or ion) are arranged in order and egometric pattern
