atoms, ions, isotopes changing atoms. element substance with a characteristic set of properties...
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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
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