elements and compounds
the fundamental building block of all matter
What is an atom?
a small number written to the lower-right of a chemical symbol, indicating the number of atoms of that element present in one molecule or formula unit
what is a subscript?
alters a substance's form, size, shape, or state (solid, liquid, gas) but never its chemical composition
what is a physical change?
meaning of aqua -
What is water?
too much of solute -
what is concentration?
a pure substance made of only one type of atom, meaning it can't be broken down into simpler substances by chemical means, acting as the fundamental building block for all matter
What is an element?
the large number placed in front of a compound (like 2 in 2H₂O) showing how many molecules or moles of that substance are involved
what is a coeffecient?
substances transform into entirely new substances with different chemical compositions and properties, involving the breaking and forming of chemical bonds
what is a chemical change?
mixture where water acts as the solvent -
what is an aqueous solution?
too much of the solvent -
what is dilution?
a substance formed when two or more different chemical elements are chemically bonded together in a fixed ratio, creating a new material with properties different from its original elements, like water (H2O)
What is a cmopound?
a one- or two-letter designation of an element.
what is a chemical symbol
signs of chemical change -
what is color, gas, light, temp., precipitation, odor
a substance that is dissolved in another substance
what is a solute?
3 factors that affect the rate of dissolution -
what is temperature, surface area, and agitation (stirring) ?
a group of two or more atoms held together by chemical bonds
What is a molecule?
a shorthand notation in chemistry that uses element symbols and numbers (subscripts) to show the types and counts of atoms in a compound
what is a chemical formula?
signs of physical change -
what are change of size, volume, color, density, ?
substance, usually a liquid, that dissolves another substance-
what is a solvent?
distance/ time =
what is average speed?
how many elements are in the following equation - Na2CO3
What is 3?
how many atoms are in this formula - 2H2O
what is 6 atoms?
phrase to remember for chemical changes -
What is college girls like to party outside/overnight?
solute + solvent =
What is a solution?
formula triangle (filled out) -
(top)
(left)
(right)
what is distance, time, and speed?