What three particles make up every atom? What are the major differences among th
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Question
What three particles make up every atom?
What are the major differences among the three particles that make up every atom?
What is the relationship between a photon and a quantum leap?
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.
When is an electron a valence electron? Why are valence electrons especially important in chemical reactions?
Are the following substances acid, base, or neutral:
sodium bicarbonate (pH = 8.3):
Blood (pH = 7.4):
milk (pH =6.7):
orange juice (pH = 3.6):
milk of magnesia (pH = 10.5):
When your body metabolizes the food you eat, are the chemical reactions endothermic or exothermic?
When a chemical reaction takes place, it is noted that the temperature in the environment of the reaction drops. Is the chemical reaction endothermic or exothermic?
Why does ice float when placed in water?
What roles do hydrogen bonding plan in this phenomena?
What information does the octane rating of a fuel provide?
When is a fuel with a high octane rating necessary?
Explanation / Answer
What three particles make up every atom?
The three main particles making up an atom are the proton, theneutron and the electron.
What are the major differences among the three particles that make up every atom?
The three particles which make up every atom differ in electrical charge and in mass, primarily. The proton and neutron have approximately the same mass but the neutron is slightly heavier; they each weigh approximately 2000 times more than the electron. The proton has a charge of +1, the neutron has no charge, and the electron has a charge of -1.
What is the relationship between a photon and a quantum leap
A photon is produced via a quantum leap.
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
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