Atoms, Ions, Isotopes

Changing atoms

Element

• Substance with a characteristic set of properties

• Examples?

Atom

•Smallest unit of an element that has all of its properties

Add or subtract a proton

• What do you get?

Boron atom Carbon atom

►A new element

Add or subtract an electron

• What do you get?

• An ion

• An ion is a particle with a charge because it has an unequal number of protons and electrons

Subtract an electron

Hydrogen Hydrogen Ion

►An ion with a positive charge because it has more protons than electrons

+

Add an electron

Fluorine Fluorine Ion

-

►An ion with a negative charge because it has more electrons than protons

Add or subtract a neutron

• What do you get?

• An isotope

• An isotope is a particle with extra neutrons

Hydrogen isotopes

Hydrogen Deuterium

►An isotope has a different number of neutrons

Add another atom

• What do you get?

• A molecule

• A molecule is 2 atoms joined together with a bond

Hydrogen molecule