Hydrogen
Pure substances made of a single type of atom
What is an element?
Formed when two or more atoms chemically combine
What is a molecule?
A row in the periodic table. Arranged from left to right by increasing atomic numbers
What is a period?
The substance that dissolves
What is a solute?
A table of chemical elements. Each element has an atomic number found above the elements symbol
What is a periodic table?
Substances with a pH between 0 and 6
What is an acid?
Theory that all matter is made up of tiny particles called atoms. The atoms of each element are identical but different from other elements
What is the Atomic Theory?
The substance (usually water) that a solute dissolves in
What is a solvent?
Contains only one type of particle or molecule
What are pure substances?
A homogenous mixture of two or more substances. Consists of a solute and a solvent
What is a solution?
Made of 2 or more different elements that have been chemically combined. Has properties different from their component elements
What is a compound?
2 or more different substances that are physically combined. Does not appear to be the same throughout
What is a Homogenous Mixture?
Smallest unit of an element and are made of subatomic particles
What is an atom?
The number of protons in the nucleus of an atom which determines the chemical properties of an element and its place in the periodic table
What is the atomic number?
Substances with a pH between 8 and 14
What is Basic?
Negatively charged subatomic particle found in a cloud outside the atom’s nuclei
What is an electron?
A column in the periodic table. Elements in the column share the same physical properties
What is a Group (family)?
Substances with a pH of 7
What is Neutral?
Positively charged subatomic particle that is inside the atom's nuclei
What is a proton?
Subatomic particle with no charge that is found inside the atom’s nuclei
What is a neutron?