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20 Cards in this Set

  • Front
  • Back
Atoms
basic building blocks of life
Elements
substance that is only made up of 1 atom
Compounds
Two or more kinds of atoms are combinded in definite proportions.
Nucleus
a small central part of an atom
Protons
small unit of mass that has positive electric charge
Neutrons
Small unit of mass that has a neutral charge
Electrons
One unit of negative electric charge
Atomic number
Tells how many units of positive charge are in the nucleus.
Molecule
Two or more atoms are combined and act as a single particle
Covalent bond
when a chemical bond is formed by the sharing of electrons
Diatomic molecule
a two-atom molecule
Ionic bond
Particles with opposite charges attract each other.
Chemical formula
Atoms combined in definite proportions.
Structural formula-
Is the number and kind of atoms in a molecule but also how the atoms are bonded to one another
Reactants-
The substances that were present before the reaction started
Products-
The new substances produced by the reaction
Law of conservation of mass
Mass can be neither created nor destroyed
Base
a compound that produces hydroxide ions when dissolved in water
Neutralization
Process of reacting an acid base to produce a neutral solution .
Chemical bond
sharing of electrons by two atoms crate a force of attraction that holds the atoms together