42 terms

Chemical Interactions - Unit 1 Vocabulary

Vocabulary from the chemistry unit
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Atom
Smallest part of an element; made up of protons, neutrons, and electrons
Atomic Mass
Total number of protons and neutrons in an atom
Atomic Number
Number of protons or electrons in an atom
Bohr Diagram
Shows the local of ALL the electrons in an atom; resembles a "bulls-eye" with the different energy levels
Chemical Formula
Represents a chemical compound (with symbols and subscripts)
Chemical Symbols
Letter or letters that are used to represent the elements
Compound
Pure substance made of two or more elements that are chemical combined
Electron
Subatomic particle with a negative charge; found in energy levels around the nucleus
Energy Level
Areas around the nucleus that contains electrons; first can hold 2, second can hold 8, and the third can hold up to 18
Family
Groups or columns of elements in the periodic table with similar properties
Isotope
Atoms of the same element with different numbers of neutrons
Lewis Structure
Diagram that show the number of VALENCE electrons in an atom; includes the chemical symbol with dots as valence electrons
Matter
Anything that has mass and volume
Metal
Elements found on the left-hand side of the periodic table, such as Na, Mg, and Au
Metalloids
Elements located along the zig-zag that have properties of metals and nonmetals
Mixture
Two or more substances mixed together, but are not chemically combined
Neutron
Subatomic particle with no charge; found in the nucleus
Nonmetals
Elements found on the right-hand side of the periodic table, such as H, O, and Cl
Nucleus
Center of the atom
Periodic Table
Chart that shows the elements arranged in families and periods based on their properties and atomic structure
Proton
Subatomic particle with a positive charge; found in the nucleus
Valence
Electrons in the outermost energy level
Solute
Substance that is dissolved in a solution
Solvent
Substance that does the dissolving in a solution
Solution
Homogeneous mixture in which one substance is dissolved in another
Colloid
A mixture made up of a liquid and particles that (because of their large size) remain suspended rather than dissolved in that liquid.
Homogeneous
Type of mixture that appears the same throughout
Heterogeneous
Type of mixture in which the individual components are visible
Subscript
Number that shows the number of atoms of each element in a compound
Coefficient
A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
Mendeleev
Father of the Periodic Table
Lanthanide
The 15 metallic elements with atomic numbers from 57 (Lanthanum, La) to 71 (Lutetium, Lu); first row of the inner transition metals
Actinide
The 15 metallic elements with atomic numbers from 89 (Actinium, Ac) to 103 (Lawrencium, Lr); second row of the inner transition metals
Alkali Metals
Group I on the periodic table with 1 valence electron; highly reactive.
Alkaline Earth Metals
Group 2 on the periodic table with 2 valence electrons
Transition Metals
Groups 3-12 in the middle of the periodic table
Boron Family
Group 13 with 3 valance electrons, both metals and metalloids
Carbon Family
Group 14 with 4 valence electrons; carbon is the only nonmetal
Nitrogen Family
Group 15 with 5 valence electrons
Oxygen Family
Group 16 with 6 valence electrons; also called chalcogens
Halogens
Group 17 with 7 valence electrons in it's outermost energy level; very reactive
Noble Gases
Group 18 with full outer shells; all are gases at room temp.
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