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Color Changes

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Submitted By ranaldson03
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Color Changes 1. What three particles make up every atom?
Protons, Neutrons, and Electrons make up every atom. 2. What are the major differences among the three particles that make up every atom?
The three particles that make up every atom differs in the electrical charge and in mass while the proton and neutron possess the same mass. The neutron tends to be a tad heavier more like 2000 times more than the electron. The proton has a positive charge (+1). The neutron has no charge and the electron has a negative charge or -1. 3. What is the relationship between a photon and a quantum leap?
A quantum is a discrete amount of energy that is carried by a photon. So in essence a quantum leap takes place when a photon carrying the right amount of energy is absorbed by the atom causing its electron to jump to a higher level. 4. Using the periodic table, determine the result of the following calculation: the number of electrons in the outer shell of a hydrogen atom minus the number of electrons in the outer shell of a helium atom plus the number of electrons in the outer shell of a hydrogen atom.
Outer shell electrons in H: 1 (s shell half filled, only one electron) Outer shell electrons in He : 2 s shell is filled- is the outer shell?) so that would mean 1-2+1=0 5. When is an electron a valence electron? Why are valence electrons especially important in chemical reactions?
An electron is considered a valence electron when it is on the very outside layer away from the nucleus.

6. Are the following substances acid, base, or neutral: 1. sodium bicarbonate (pH = 8.3):base 2. Blood (pH = 7.4):neutral 3. milk (pH =6.7): neutral 4. orange juice (pH = 3.6): acid 5. milk of magnesia (pH = 10.5): base 7. When your body metabolizes the food you eat, are the chemical reactions endothermic or exothermic? Endothermic

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