The Scientific Method
The final summary of results, it determines if the hypothesis is true or false.
What is the conclusion?
The process where a substance burns in the presence of oxygen.
What is combustion?
A visual model that shows the most likely locations for electrons in an atom.
What is the Electron Cloud?
He organized the elements and invented the Periodic Table.
Who is Dmitri Mendeleev?
A chemical bond in which electons are transferred between two atoms.
What is a ionic bond?
An educated guess about what is going to happen in an experiment.
What is a hypothesis?
A physical property of a liquid that refers to its resistance to flow.
What is viscosity?
The subatomic particles found in the nucleus of an atom.
What are protons and neutrons?
The electrons in the outermost energy level of an atom.
What are valence electrons?
An ion with a negative charge.
What is an anion?
A group that does not receive the treatment being studied in an experiment.
What is a control group?
A mixture with parts that are so evenly distributed that it appears to be one substance.
What is a homogeneous mixture?
He envisioned atoms as solid, hard spheres, like billiard balls, and created what is known as the Billiard Ball Model.
Who is John Dalton?
They have properties of both metals and nonmetals.
What are metalloids?
A reaction where multiple reactants combine to make one product.
What is a synthesis reaction?
It predicts a pattern seen in nature and answers "What happens?" but does NOT explain WHY.
What is a scientific law?
A scale of 0-14 that shows how acidic or alkaline a substance is.
What is pH?
He conducted the Gold Foil Experiment, proving the the center of the atom contains a nucleus.
Who is Ernest Rutherford?
A group of elements that have 2 valence electrons, are usually found in a compound in nature.
What are the Alkaline Earth Metals?
A special type of ion made up of a group of bonded atoms that, as a group, has a positive or negative charge.
What is a polyatomic ion?
The three types of experimental variables.
What are dependent, independent, and controlled variables?
A substance made up of only one kind of atom.
What is an element?
On a periodic table, which subatomic particles make up the mass an atom?
What are protons and neutrons?
The two liquids on the Periodic Table.
What are bromine and mercury?
A bond formed when electrons are not shared equally between two atoms.
What is a polar covalent bond?