Share Chemistry Unit 1 Science Dimensions HMH
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Anything that has mass and takes up space
matter
A measure of the amount of matter in an object
mass
A measure of the gravitational force exerted on an object; its value can change with the location of the object in the universe
weight
The amount of space that an object takes up, or occupies
volume
The ratio of the mass of a substance to the volume of the substance
density
A substance that cannot be separated or broken down into simpler substances by chemical means
element
The smallest unit of an element that maintains the properties of that element
atom
An arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in the same column, or group
periodic table
A sample of matter, either a single element or a single compound, that has definite chemical and physical properties
pure substance
A group of atoms that are held together by chemical bonds; the smallest unit of a compound that keeps all the properties of that substance
molecule
The attractive force that holds atoms or subunits of atoms together
chemical bond
A substance made up of atoms of two or more different elements joined by bonds
compound
A solid whose atoms, ions, or molecules are arranged in a regular, repeating pattern
crystal
