Question | Answer |
the smallest unit of an element that maintains the chemical properties of that element | atom |
a change that occurs when one or more substances change into entirely new substances with different properties | chemical change |
a change of matter from one form to another without a change in chemical properties | physical change |
a substance having a specific molecular composition | chemical |
the study of the structure, properties, and reactions of matter and the energy changes that accompany those reactions | chemistry |
a substance made up of atoms of two or more different elements joined by chemical bonds | compound |
a substance that cannot be separated or broken down into simpler substances by chemical means | element |
a form of matter that does not have a definite volume or shape | gas |
a vertical column of elements in the periodic table | group or family |
a state of matter that has a definite volume but not a definite shape | liquid |
measure of the amount of matter in an object | mass |
anything that occupies space and has mass | matter |
an element that is shiny and that conducts heat and electricity well | metal |
an element that has properties of both metals and non metals | metalloid |
an element that conducts heat and electricity poorly and that does not form positive ions in an electrolytic solution | non metal |
a combination of two or more substances that are not chemically combined | mixture |
in chemistry; a horizontal row of elements in the periodic table | period |
a substance that forms in a chemical reaction | product |
a property of matter that describes a substances ability to participate in chemical reactions | chemical property |
a characteristic of a substance that does not involve a chemical change, such as density, color, or hardness | physical property |
a sample of matter either a single element of a single compound that has definite chemical and physical properties | pure substances |
a substance or molecule that participates in a chemical reaction | reactant |
the state of matter in which the volume and shape of a substance are fixed | solid |