Question | Answer |
Alloy | A solid solution containing different metals, and sometimes nonmetallic substances. |
Aqueous Solution | A solution in which the solvent is water. |
Density | The amount of matter (mass) in a given unit volume. |
Endothermic | Chemical reaction that absorbs heat energy. |
Exothermic | Chemical Reaction that gives off heat energy. |
Law of Conservation of Mass | In a chemical change, matter is neither created nor destroyed. |
Mass | The measure of the amount of matter an object contains. |
Matter | Anything that takes up space and has mass. |
Compound | A chemical combination of two or more different elements joined together in a fixed proportion. |
Mixture | A combination of two or more substances in which the basic identity of each substance is not changed. |
Physical Change | A change in matter where its identity does not change. |
Chemical Change | The change of one or more substances into other substances. |
Qualitative | An observation made without measurement. |
Solute | The substance that is being dissolved when making a solution. |
Solvent | The substance that dissolves the solute when making a solution. |
Solution | A mixture that is the same throughout, or homogeneous. |
Neutron | A subatomic particle with a mass equal to a proton but with no electrical change. |
Proton | A positively charged subatomic particle. |
Electron | Negatively-charged particle. |
Nucleus | The small dense, positively charged central core of an atom. |
Theory | An explanation based on many observations and supported by the results of many experiments. |
Law of Conservation of Energy | Statement that energy is neither created nor destroyed in a chemical change, but is simple changed from one form to another. |
Law of Conservation of Mass | In a chemical change, matter is neither created nor destroyed. |
Atomic Number | The number of protons in the nucleus of an atom of an element. |
Atomic Mass | The amount an atom weighs. |
Electromagnetic Spectrum | The whole range of electromagnetic radiation. |
Electron Cloud | The space around the nucleus of an atom where the atom's electrons are found. |
Periodic Table | Created by Dimitri Mendelev. An organized table with the elements of the earth. |
Valence Electrons | An electron in the outermost energy level of an atom. |
Li (Alkali) | Lithium |
Na (Alkali) | Sodium |
K (Alkali) | Potassium |
Rb (Alkali) | Rubidium |
Cs (Alkali) | Cesium |
Fr (Alkali) | Francium |
Be (Alkaline) | Beryllium |
Mg (Alkaline) | Magnesium |
Ca (Alkaline) | Calcium |
Sr (Alkaline) | Strontium |
Ba (Alkaline) | Barium |
Ra (Alkaline) | Radium |
H (Nonmetal) | Hydrogen |
He (Nonmetal) | Helium |
B (Nonmetal) | Boron |
C (Nonmetal) | Carbon |
O (Nonmetal) | Oxygen |
F (Nonmetal) | Flourine |
Si (Nonmetal) | Silicon |
P (Nonmetal) | Phosphorus |
S (Nonmetal) | Sulfur |
Cl (Nonmetal) | Chlorine |
As (Nonmetal) | Arsenic |
Se (Nonmetal) | Selenium |
Br (Nonmetal) | Bromine |
Te (Nonmetal) | Tellurium |
I (Nonmetal) | Iodine |
At (Nonmetal) | Astatine |
Ne (Nonmetal) | Neon |
Ar (Nonmetal) | Argon |
Kr (Nonmetal) | Krypton |
Xe (Nonmetal) | Xenon |
Rn (Nonmetal) | Radon |
Ti (Inner/Trasition Metal) | Titanium |
Fe (Inner/Trasition Metal) | Iron |
Ag (Inner/Trasition Metal) | Silver |
Pt (Inner/Trasition Metal) | Platinum |
Al (Inner/Trasition Metal) | Aluminum |
Cr (Inner/Trasition Metal) | Chromium |
Ni (Inner/Trasition Metal) | Nickel |
Au (Inner/Trasition Metal) | Gold |
Hg (Inner/Trasition Metal) | Mercury |
Ge (Inner/Trasition Metal) | Germanium |
Nm (Inner/Trasition Metal) | Manganese |
Cu (Inner/Trasition Metal) | Copper |
W (Inner/Trasition Metal) | Tungsten |
U (Inner/Trasition Metal) | Uranium |
Rutherford's Experiment | Consisted of a lead-shielded box containing radioactive polonium, which emitted positively charged particles through a small hole. |
Democritus | Proposed that the world is made up of empty space and atoms. |
Dalton | Made the atomic theory. |
The Chocolate Chip Cookie Theory | Made by Thomson. |
The Planetary Revolution Theory | Made by Niels Bohr. |
The Electron Cloud Theory | Made by Modern Scientists. |