What is formed when two or more atoms join together chemically.
Molecule
100
Liquid mixtures that do not separate out?
Colloids
100
A molecule that contains at least two different elements.
Compound
200
Name the five different Atomic models.
Dalton Model, Thomson Model (Blueberry Muffin Model), Rutherford Model, Solar System Model, and Electron Cloud Model
200
The total mass of protons and neutrons in a nucleus.
Atomic mass
200
What is a valence electron.
They are the electrons in a chemical bond, electrons in an atom's outermost shell.
200
What is the difference between compounds and mixtures?
Compounds involve a chemical change and Mixtures involve physical change.
200
Most of the mass of any atom is at its center or?
Nucleus
300
Describe the parts of an atom.
Electrons, Neutrons, and Protons
300
Identify the four main symbols of elements.
Atomic number, Atomic mass, Symbol, and the Name
300
Explain what a chemical formula is.
Is used to express the way that atoms of various elements form bonds to become molecule and compounds.
300
Identify the three main factors that affect the point of dissolving.
Temperature, Agitation, and Surface area
300
What is the difference between periods and groups.
Periods are rows of elements. Groups are what makes up the columns of the table.
400
How are atoms and elements different?
Atoms are what makes up matter. Elements is the simplest form of matter
400
What did Henry Moseley sort the periodic table by?
Atomic number
400
When elements combine to form a compound, they form a new substance. Does it keep its original properties or does it change.
It changes very differently.
400
Name five ways to separate a mixture.
Magnetism, Filtration, Evaporation, Distillation, and Paper Chromatography
400
How does an atom become an ion?
When the atom gains or loses electron.
500
What is the difference between electrons and protons.
Protons are positively charged and electrons are negatively charged.
500
What makes noble gasses different from most of the other elements
They are colorless, odorless, and do not react to other elements as well.
500
What happens when two ions combine?
They form a compound called sodium chloride.
500
What is the benefit of alloys.
Alloys are stronger than other metals.
500
What is the difference between ionic bonds and covalent bonds.
An ionic bond forms from the attraction of the oppositely charged ions. When two atoms share electrons to form a chemical bond, that is a covalent bond.