Chapter 11
A molecule has Mass Structure Energy All of these None of these
All of these
The air in this room has Mass Weight Energy All of these None of these
All of these
Solid matter is mostly empty space. The reason solids don't fall through one another is because
Atoms are constantly vibrating, even at absolute zero Of nuclear forces Of gravitational forces Of electrical forces None of these
Which of the following statements is true? An atom is the smallest partial known to exist There are only about 100 different kinds of atoms that combine to form all substances There are thousands of different kinds of atoms that account for a wide variety of substances Atoms are so small that there is no way we can photograph them None of these are true
B) there's only about 100 different kinds of atoms that combine to form all substances
Which of these forces determines the chemical properties of an atom A friction force Nuclear force Gravitational force Electrical force None of these
Electrical force
Which has the greatest number of protons in its nucleus? Gold Mercury Lead Silver
Lead
Which of these statements is true? A molecule is the smallest particle that's exists Chemical elements are made up of about 100 distinct molecules Molecules form atoms that in turn determine Molecules are the smallest subdivision of matter that still retains chemical properties of a substance None of these statements is true
Molecules are the smallest subdivision of matter that still retains chemical properties of a substance
If we doubled the magnifying power of the most powerful optical microscope in the world, we would -Be able to see the individual atoms -Be able to photograph individual atoms, even though we couldn't see them. - still not be able to see an atom
Still not be able to see an atom
Compared to the energy it takes to separate oxygen and hydrogen from water, the amount of energy given off when they recombine is
The same
Which of these atoms has the most mass Hydrogen Iron Lead Uranium All have the same mass
Uranium
An atomic mass unit (amu) is 1/12 the mass of An electron A proton A hydrogen atom A carbon atom A uranium
carbon atom
