Studying Atoms

Studying Atoms

4.1

Multiple Choice

Democritus thought that matter was made of tiny particles

• of earth, air, fire, and water

• that could not be divided

• that could be divided

• that were all round and smooth

Multiple Choice

If 2 grams of element X combine with 4 grams of element Y to form compound XY, how many grams of element Y would combine with 8 grams of X to form the same compound?

• 6 grams

• 16 grams

• 18 grams

• 24 grams

Multiple Choice

According to John Dalton's Law of Multiple Proportions, when elements combine in a compound...

• the ratio of their masses is always the same

• each element contributes an equal number of atoms

• their volumes are always equal

• their masses are always equal

Multiple Choice

Which of the following is NOT part of John Dalton's atomic theory?

• All elements are composed of atoms

• All atoms of the same element have the same mass

• Atoms contain subatomic particles

• A compound contains atoms of more than one element

Multiple Choice

Based on the image, what side of the magnet is closest to the cathode ray tube?

• Positive

• Negative

Multiple Choice

J.J. Thomson discovered...

• Nucleus

• Protons

• Neutrons

• Electrons

Multiple Choice

Rutherford's gold foil experiment provided evidence for which of the following?

• Negative and positive charges are spread evenly throughout an atom

• Alpha particles have a positive charge

• Gold is not as dense as previously thought

• There is a dense, positively charged mass in the center of the atom

Multiple Choice

In an atomic model that includes a nucleus, the positive charge is...

• concentrated in the center of the atom

• Spread evenly throughout the atom

• Concentrated at multiple sites in an atom

• Located in the space outside the nucleus

Multiple Choice

Which statement best describes Rutherford's model of the atom?

• It is like an avocado with the pit representing the nucleus

• It is like an aquarium with swimming fish representing positive charges

• It is like a fried egg with the yolk representing the nucleus

• It is like a huge stadium with a positively charged marble at the center

Poll

How did you like this lesson format?

• I would want to use this again

• I don't care either way

• I would never want to use this again