5 Written questions
5 Matching questions
- None. All of the above choices are mixtures.
- There are only about 100 different kinds of atoms that combine to form all substances
- 16 times as great
- random motions of atoms and molecules
- a 13) Which of the following is not a mixture?
D) beach sand
E) None. All of the above choices are mixtures.
- b 11) Brownian motion has to do with the
A) size of atoms.
B) atomic vibrations.
C) first direct measurement of atomic motion.
D) random motions of atoms and molecules.
E) rhythmic movements of atoms in a liquid.
- c 9) Which of the following statements is true?
A) An atom is the smallest particle known to exist.
B) There are only about 100 different kinds of atoms that combine to form all substances.
C) There are thousands of different kinds of atoms that account for a wide variety of substances.
D) A large atom can be photographed with the aid of an ordinary microscope.
E) None of these statements are true.
- d 1) How many different elements are in a water molecule?
- e 32) Compared to the mass of a hydrogen atom, the mass of an oxygen atom is
A) 8 times as great.
B) 12 times as great.
C) 16 times as great.
D) appreciably more than 16 times as great.
5 Multiple choice questions
- 4) Atoms heavier than helium were made by
B) thermonuclear fusion.
C) radiant energy conversion.
E) none of these
- 38) To change mercury into gold, a pair of protons must be
A) removed from the mercury nucleus.
B) added to the mercury nucleus.
C) removed from the gold nucleus
D) added to the gold nucleus.
E) None of the above is true.
- 25) Assuming all the atoms exhaled by Julius Caesar in his last dying breath are still in the atmosphere, then we probably breathe one of those atoms with each
A) single breath.
D) ten years.
E) It depends - some people still breathe a few of Caesar's atoms every day, while others wouldn't breathe one for an entire year.
- 43) Which of these atoms has the greatest amount of electrical charge in its nucleus?
- 26) Nuclei of atoms that make up a newborn baby were made in
A) the mother's womb.
B) the food the mother eats before giving birth.
C) ancient stars.
D) the Earth.
E) none of these
5 True/False questions
the astronaut and an equal amount of the planet would both annihilate → 6) If we doubled the magnifying power of the most powerful optical microscope in the world, we would
A) be able to see individual atoms.
B) be able to photograph individual atoms, even though we couldn't see them.
C) still not be able to see or photograph an atom.
999 grams → 36) What is the molecular mass of a water molecule?
A) 10 amu
B) 12 amu
C) 15 amu
D) 18 amu
E) None of these. It depends on the temperature.
carbon → 12) Which of the following is not a compound?
E) All are compounds.
lead → 19) Which has the greatest number of protons in its nucleus?
2 → 1) How many different elements are in a water molecule?