Topic: Chapter 3- Atoms: the Building Blocks of Matter

Isotopes

Atoms of the same element with a different number of neutrons; therefore, they will have a different mass number, but the same chemical properties because the # of electrons does not change

Nuclear Symbols

Mass number at the top left; Atomic number at the bottom left

Identify All Particles in Isotopes

Calculate the number of neutrons by subtracting the atomic number from the isotope number

Electromagnetic Radiation- Emission

The Mole

Equal to 6.02 times 10^23 (Avogadro’s Number)