Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Introduction to Chem
Introduction to Chemistry
| Term | Definition |
|---|---|
| Atom | the smallest unit of an element that maintains the properties of that element |
| Atomic Number | the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element |
| Average Atomic Mass | the weighted average of the masses of all naturally occurring isotopes of an element |
| Chemical Bond | an interaction that holds atoms or ions together |
| Chemical Equation | a representation of a chemical reaction that uses symbols to show the relationship between the reactants and products |
| Chemical Formula | a combination of chemical symbols and numbers to represent a substance |
| Chemical Reaction | the process in which atoms are rearranged and chemical bonds are broken and formed to produce a chemical change of an substance |
| Chemical Symbol | a one-, two- or three letter abbreviation of the name of an element |
| Electron Cloud | a region around the nucleus of an atom where electrons are likely to be found |
| Electron | a subatomic particle that has a negative charge |
| Endothermic Reaction | a chemical reaction that requires energy input, usually as heat |
| Exothermic Reaction | a chemical reaction in which energy is released to the surroundings, usually as heat |
| Group | a vertical column of elements in the periodic table; elements in a group share chemical properties |
| Law of Conservation of Energy | the law that states that energy cannot be created or destroyed but can be changed from one form to another |
| Law of Conservation of Mass | the law that states the mass cannot be created or destroyed in ordinary chemical and physical changes |
| Mass Number | the sum of the numbers of protons and neutrons in the nucleus of an atom |
| Metal | an element that is shiny and that conducts heat and electricity well |
| Metalloid | an element that has properties of both metals and nonmetals |
| Neutron | a subatomic particle that has no charge and that is located in the nucleus of an atom |
| Nonmetal | an element that conducts heat and electricity poorly |
| Nucleus | in physical science, an atom's central region, which is made up of protons and neutrons |
| Period | in chemistry, a horizontal row of elements in the periodic table |
| Periodic Table | an arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in the same column, or group |
| Product | a substance that forms in a chemical reaction |
| Proton | a subatomic particle that has a positive charge and that is located in the nucleus of an atom; the number of protons in the nucleus is the atomic number, which identifies the identity of an element |
| Reactant | a substance that participates in a chemical reaction |
| Valence Electron | an electron that is found in the outermost shell of an atom and that determines the atom's chemical properties |
Created by:
Mrs_Gore
Popular Science sets