5 Written questions
5 Matching questions
- the same age
- 16 times as great
- 18 amu
- a carbon atom
- a 27) Compared to the atoms that make up the body of an elderly person, the atoms that make up the body of a newborn baby are
B) actually older.
C) the same age.
- b 44) Which of these atoms has the greatest number of electrons?
- c 5) An atomic mass unit (amu) is 1/12 the mass of
A) an electron.
B) a proton.
C) a hydrogen atom.
D) a carbon atom.
E) a uranium atom.
- d 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.
- 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
- 43) Which of these atoms has the greatest amount of electrical charge in its nucleus?
- 24) In our part of the universe, antimatter is
- 2) Which of the following are electrically neutral?
E) none of these
- 37) If two protons are removed from an oxygen nucleus, the result is
E) positively charged oxygen.
- 19) Which has the greatest number of protons in its nucleus?
5 True/False questions
mostly empty space themselves → 28) The reason a granite block is mostly empty space is that the atoms in the granite are
A) in perpetual motion.
B) mostly empty space themselves.
C) held together by electrical forces.
D) not as close together as they could be.
two → 42) How many protons should be added to the nuclei of oxygen atoms so the resulting gas will glow red when there is an electric current through it?
E) But protons will have to be subtracted, not added.
random motions of atoms and molecules → 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.
given off by the reaction → 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.
electrical force → 17) Solid matter is mostly empty space. The reason solids don't fall through one another is because
A) atoms are constantly vibrating, even at absolute zero.
B) of nuclear forces.
C) of gravitational forces.
D) of electrical forces.
E) none of these