quiz 4 (chapter 11)

which contains more atoms: 1 kg of lead or 1 kg of aluminum? a. 1 kg of lead b. 1 kg of aluminum

b. 1 kg of aluminum

if we doubled the magnifying power of the most powerful optical microscope in the world, we would: a. be able to photograph individual atoms, even though we couldn't see them b. be able to see individual atoms c. still not be able to see or photograph an atom

c. still not able to see or photograph an atom

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: a. actually older b. newer c. the same age

c. the same age

an atomic mass unit (amu) is 1/12 the mass of: a. a hydrogen atom b. a carbon atom c. a uranium atom d. a proton e. en electron

a. a hydrogen atom

a force that determines the chemical properties of an atom is an: a. electrical force b. nuclear force c. friction force d. gravitational force e. none of these

a. electrical force

which of these statements are true? a. molecules are the smallest subdivision of matter that still retains chemical properties of a substance b. a molecule is the smallest particle that exists c. molecules from atoms that in turn determine chemical properties of a substance d. chemical elements are made up of about 100 distinct molecules e. none of these statements are true

a. molecules are the smallest subdivision of matter that still retains chemical properties of a substance

the weight of matter comes mostly from its: a. protons and neutrons b. empty spaces between atoms c. electrons

a. protons and neutrons

which of the following statements is true? a. there are only about 100 different kinds of atoms that combine to form all substances b. an atom is the smallest particle know to exist 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

a. there are only about 100 different kinds of atoms that combine to form all substances

the reason a granite block is mostly empty space is that the atoms in the granite are: a. invisible b. mostly empty space themselves c. not as close together as they could be d. in perpetual motion e. held together by electrical forces

b. mostly empty space themselves

in a closed bottle are a certain number of hydrogen molecules. in an identical closed bottle at the same temperature and internal pressure are a certain number of nitrogen molecules. the bottle with the greater number of molecules is the one containing: a. hydrogen b. nitrogen c. both are the same

c. both are the same

the chemical properties of matter come mostly from its: a. neutrons b. protons c. electrons

c. electrons

what is the molecular mass of a water molecule? a. 15 amu b. 12 amu c. 10 amu d. 18 amu e. none of these. depends on temperature

d. 18 amu

how many atoms are in a molecule of ethanol, C2H6O? a. 3 b. 6 c. 8 d. 9 e. none of these

d. 9

if one neutron is added to a helium nucleus, the result is: a. hydrogen b. beryllium c. boron d. helium e. lithium

d. helium

to change mercury into gold, a pair of protons must be: a. added to the mercury nucleus b. added to the gold nucleus c. removed from the mercury nucleus d. removed from the gold nucleus e. none of the above is true

e. none of the above are true