Chapters 11 for Section Test 2

If a gram of antimatter meets a kilogram of matter, the amount of mass to survive is 1 gram. 999 grams. 1 kilogram. 1.1 kilogram.

999 grams.

Which of the following statements is true? There are only about 100 different kinds of atoms that combine to form all substances. An atom is the smallest particle known to exist. A large atom can be photographed with the aid of an ordinary microscope. There are thousands of different kinds of atoms that account for a wide variety of substances. None of these statements are true.

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

Nuclei of atoms that make up a newborn baby were made in the Earth. the mother's womb. the food the mother eats before giving birth. ancient stars. none of these

ancient stars.

A positron orbiting an antiproton would make up an atom of anti-hydrogen. anti-helium. positronium. unobtainium. none of these

anti-hydrogen.

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 hydrogen. nitrogen. both the same

both are the same.

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 ten years. month. It depends - some people still breathe a few of Caesar's atoms every day, while others wouldn't breathe one for an entire year. single breath. day.

breath.

If one neutron is added to a helium nucleus, the result is lithium. boron. hydrogen. beryllium. helium.

helium.

In our part of the universe, antimatter is short-lived. plentiful. long-lived. non-existent.

short-lived.

Atoms heavier than helium were made by radiant energy conversion. thermonuclear fusion. photosynthesis. radioactivity. none of these

thermonuclear fusion.

Which of these atoms has the greatest amount of electrical charge in its nucleus? uranium iron carbon gold helium

uranium