Definitions Flashcards
(16 cards)
What is an atom?
The atom is a basic unit of matter, which cannot be broken down into anything simpler by chemical reactions.
What is a chemical element?
A chemical element is a pure chemical substance consisting of only one type of atom.
What is a mixture?
A mixture is a combination of two or more elements or compounds, which can be separated by physical means.
What is a compound?
A compound is a combination of two or more elements chemically bonded together in fixed proportions, which cannot be separated by physical means.
What is atomic number?
The atomic number is the number of protons in a nucleus of an atom.
What is atomic mass?
The atomic mass is the number of protons and neutrons in a nucleus of an atom.
What is a positive ion?
A positive ion is the result of an atom (metal or hydrogen) losing one or more electrons.
What is a negative ion?
A negative ion is the result of an atom (non-metals) gaining one or more electrons.
What is an alloy?
An alloy is a mixture of metals.
What is rusting?
Rusting is the reaction between iron, oxygen and water to form iron oxides.
What is a solvent?
A solvent is a liquid that solids dissolve in.
What is a solute?
A solute is the solid that dissolves in a solvent.
What is a solution?
A solution is a mixture of the dissolved solid and solvent.
What is a saturated solution?
A saturated solution is a solution that no more solute can be dissolved in at a stated temperature.
