ch. 3 review the atom: from idea to theory the structure of the atom counting atoms
TRANSCRIPT
Ch. 3 REVIEW
The Atom: From Idea to TheoryThe Structure of the Atom
Counting Atoms
Section 1
• Who coined the term “atom?”
Section 1
• Explain the law of conservation of mass
Section 1
• Explain the law of definite proportions
Section 1
• Explain the law of multiple proportions
Section 1
• What is a chemical reaction?
Section 1
• Who proposed the Atomic Theory?
Section 1
• State 2 of the 5 parts of Dalton’s Atomic Theory
Section 1
• Distinguish between scientific theory and a scientific law
Section 1
• Three compounds containing potassium and oxygen are compared. Analysis shows that for each 1.00 g of O, the compounds have 1.22 g, 2.44 g, and 4.89 g of K, respectively. Show how these data support the law of multiple proportions.
Section 2
• Define atom
Section 2
• Identify the 2 regions of an atom… state what subatomic particles are found in each.
Section 2
• JJ Thomson is given credit for discovering what?
Section 2
• What did JJ Thomson use in his experiments that led to the discovery of the electron?
Section 2
• What atomic model did JJ Thomson propose?• Describe this model.
Section 2
• Before Thomson’s plum pudding model, the model that existed and was widely accepted was the solid sphere model. Who proposed the idea of the solid sphere model?
Section 2
• Explain Rutherford’s gold foil experiment (procedure & conclusion)
Section 2
• What is the name of the atomic model proposed by Rutherford based on his gold foil experimental results?
Section 2
• Niels Bohr proposed the _________________Model of atomic structure. Describe this model.
Section 2
• What two subatomic particles are found in the nucleus? What holds these particles together in the nucleus?
Section 2
• State the location, charge, and relative masses of the 3 subatomic particles
Section 3
• Define atomic number
Section 3
• Define mass number (or atomic mass)
Section 3
• What units are used to described the mass #?
Section 3
• What is the name of the instrument used to measure the atomic mass of an atom?
Section 3
• Explain what isotopes are.
Section 3
• Do isotopes of an element have different atomic #’s or different mass #’s?
Section 3
• What is a nuclide?
Section 3
• Write the 3 isotopes of Hydrogen in hyphen notation.
Section 3
• Write the nuclear symbol for uranium-235 (use the periodic table!)
Section 3
• Define the term mole
Section 3
• What is Avogadro’s Number?
Section 3
• Define molar mass
Section 3
• What is the average atomic mass of an element?
Section 3
• What is meant by the term “percent abundance” of an element?
Section 3
• Isotopes of an element have different masses. Does this cause them to differ in their chemical behavior?
Section 3
• How do you determine how many atoms are in a certain amount of moles of a substance?
Section 3
• How do you determine how many atoms are in a certain amount of grams of something?
Section 3
• How do you determine how many moles are in a certain amount of grams of something?