click below
click below
Normal Size Small Size show me how
Matter & Its Home
Atomic Structure and Periodic Table
Term | Definition |
---|---|
The smallest unit of matter. | Atom |
Positively charged subatomic particle that is found in the nucleus of an atom. | Proton |
The neutral or no charge subatomic particle that is found in the nucleus of an atom. | Neutron |
The negatively charged particle found in a cloud around the nucleus of an atom. | Electron |
The center of the atom, where the protons and neutrons are located. | Nucleus |
Antother name for the location of electrons on the Bohr model: orbitals,energy levels, rings and ___? | shells |
The name for the electrons found on the outermost shell or electron ring of an atom. | valence electrons |
The name of the number on an element key that tells you the number of protons for that element. | atomic number |
The name of the number on a periodic table element key that shows the number of protons plus neutrons. | atomic mass |
This is used to describe atoms that have the same number of protons and electrons. | electrically neutral |
Letters on the periodic table that are shorthand for the name | chemical symbol |
Protons, neutrons and electrons; parts of an atom | subatomic particles |
A pure substance, made only of one kind of atom | element |
Model of an atom showing the placement and numbers of protons, neutrons and electrons | Bohr Model |
Anything that has mass and volume | matter |
Horizontal rows on the periodic table; elements in the same row have the same number of electron rings. | period |
Elements arranged in columns; elements in the same column share similar chemical characteristics since they have the same number of valence electrons. | group |
Elements found to the left of the zig-zag (metalloid) line; they have luster, are malleable, are good conductors and are solids. | metal |
Elements found to the right of the zig-zag (metalloid) line; they are gases or are brittle solids at room temperature; they have characteristics opposite of metals. | nonmetal |
Group of elements that rest on the zig-zag line that show characteristics of both metals and nonmetals. | metalloids |
Group number 18 on the Periodic Table which are inert due to the fact that their valence electron ring is full. | Noble Gases |
Unreactive; will not react with other elements. | Inert |