Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
Element |
a pure substance (all same type of atom) represented by a chemical symbol on the periodic table |
|
|
Periodic Table |
a chart that organizes elements in order of increasing atomic number |
|
|
Atoms |
smallest amount of a substance that will still retain all the features of that substance |
|
|
Compound |
2 or more elements that are chemically bonded and cannot be physically separated. Represented by a chemical formula (Ex: water H20) |
|
|
Reactants |
substances that are mixed together |
|
|
Products |
substances that are made during a chemical reaction |
|
|
Nucleus |
Center of an atom; contains protons and neutrons |
|
|
Proton |
-Positively charged part of an atom -In nucleus of an atom -same as atomic number -number of protons determines the element |
|
|
Neutron |
-no charge (neutral) -in nucleus of atom - atomic mass - atomic number = neutrons |
|
|
Electron |
-negatively charged -oribit nucleus in the electron cloud (energy levels) -usually same as atomic number |
|
|
Atomic number |
-number of protons in an atom -how elements are arranged on the periodic table |
|
|
Atomic mass |
protons + neutrons |
|
|
Period |
-Horizontal Row on the periodic table -tells the number of energy levels in an atom |
|
|
Group |
-vertical column on the periodic table -elements in the same group have similar chemical properties |
|
|
Energy level |
area where electrons orbit the nucleus of an atom 1st energy level can hold 2 electrons 2nd energy level can hold 8 electrons 3rd energy level can hold 18 electrons |
|
|
Valence electron |
electron in the outermost energy level of an atom |
|
|
subscript |
small number listed after an element symbol in a compound shows how many atoms of a certain element are in a compound |
|
|
coefficient |
number appearing before an element or compound in a chemical equation Shows the number of molecules of the compound that are in the chemical equation |
|
|
inorganic compound |
a compound that does not contain carbon bonded to itself or hydrogen |
|
|
organic compound |
a compound that contains carbon bonded to itself and/or hydrogen |
