Sodium Chlorine Sodium chloride 1 Reactants Reaction Products 2 H 2 2 H 2 O O 2 + 2 3 Nucleus Protons (+ charge) determine element Neutrons (no charge) determine isotope Electrons (– charge) form negative cloud and determine chemical behavior Atom 4 Cloud of negative charge (2 electrons) Electrons Nucleus (a) (b) 5 A ball bouncing down a flight of stairs provides an analogy for energy levels of electrons. Third shell (highest energy level in this model) Second shell (higher energy level) First shell (lowest energy level) Atomic nucleus Energy absorbed Energy lost (b) (a) 6
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Reactants Reaction Products - Estrella Mountain · PDF fileSodium Chlorine Sodium chloride 1 Reactants Reaction Products 2 H 2 + O 2 2 H 2O 2 3 Nucleus Protons (+ charge) determine
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Sodium Chlorine Sodium chloride
1
Reactants Reaction Products
2 H2 2 H2O O2 +
2
3
Nucleus
Protons (+ charge) determine element
Neutrons (no charge) determine isotope
Electrons (– charge) form negative cloud and determine chemical behavior
Atom
4
Cloud of negative charge (2 electrons)
Electrons
Nucleus
(a) (b)
5
A ball bouncing down a flight of stairs provides an analogy for energy levels of electrons.