Chapter 4: The Structure of the Atom

Which of the following is not true of Greek philosopher's and matter?

• Used experimental evidence.

• Made up of fire, wind, air, and earth.

• Democritus believed matter to be divisible to a point.

• Aristotle believed empty space could not exist.

Which of the following of Dalton's Atomic Theory are incorrect ideas?

• Matter is composed of small particles called atoms

• Atoms are indivisible and indestructible

• Atoms of a specific element are different from other elements

• Atoms of a one elements are all identical in size, mass, and chemical properties

• Different atoms combine in a simple whole-number ratios to form compounds

A _______ has a +1 charge and an amu value of 1.

• Electron

• Proton

• Neutron

Who created the atomic model shown here?

• Rutherford

• Thomson

• Crookes

• Millikan

What evidence led to the creation of this model?

• Matter is neutral

• Gold-Foil Experiment

• Alpha particles passed through the atom with little to no deflections

• Some alpha particles passed through the atom with large deflections

What is the atomic number?

• 7

• 14.007

• N

• Nitrogen

How many protons does this element have?

• 26

• 56

• 30

How many neutrons does this element have?

• 26

• 56

• 30

T/F: The number of protons and neutrons are always equal.

• True

• False

Which atomic model is most accurate based on Chapter 4?

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