The total mass of all the protons and neutrons in a nucleus.
100
Define molecules and compounds.
Molecule is formed when two or more atoms join together chemically. Compound is a molecule that contains at least two different elements.
100
What is a mixture?
What is Mixture forms when two or more substances combine and stay the same
100
A table that we use today, that organizes the elements.
The Periodic Table of Elements
200
Describe the parts of an atom.
Most of the mass in any atom is at its center or nucleus.
200
Describe the organization of the periodic table.
It is sorted by the atomic number.
200
Describe the relations between atoms, elements, molecules, and compounds.
They all make up each other
200
Distinguish between compounds and Mixtures.
A compound is a molecule, but a mixture is a substance.
200
Define Ion.
An atom that gains or loses an electron.
300
Two things that make up matter are _____ and _____?
molecules, atoms
300
What are periods?
They are rows of elements that run left to right with some skips in between.
300
What is a chemical formula?
A chemical formula is used to express the way that atoms of various elements form bonds to become molecules and compounds.
300
Liquid mixtures containing small particles that do not separate out, are?
Colloids
300
Name five atomic models.
Dalton, Thomson(Blueberry Muffin), Rutherford, Solar System, and Electron Cloud models.
400
Distinguish between atoms and elements.
Atoms are small particles that make up elements or matter but cannot be seen with the untrained eye. But elements are every day things that we see and feel.
400
What are groups?
They make up columns of the table.
400
Distinguish between ionic and covalent bonds.
An ionic bond forms from the attraction of oppositely charged ions.
400
What are two ways to separate a mixture.
magnets, static, filtration, chromatography
400
Define Colloid.
The particles do not settle and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.