Physics: Ch. 11

D. anti-hydrogen

A positron orbiting an antiproton would make up an atom of A. a positronium B. unobtainium C. anti-helium D. anti-hydrogen E. none of these

D. a carbon atom

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

C. the same

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. newer B. actually older C. the same age

E. the same

Compared to the energy it takes to separate oxygen and hydrogen from water, the amount of energy given off when they recombine is A. slightly more B. slightly less C. much more D. much less E. the same

C. orbital electrons

In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of A. neutrons B. quarks C. orbital electrons D. all of these E. none of these

C. short lived

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

B. electrons

The chemical properties of matter come mostly from its A. protons B. electrons C. neutron

B. electrons

The volume of matter comes mostly from its A. protons B. electrons C. neutrons

A. protons

The weight of matter comes mostly from its A. protons B. electrons C. neutrons

A. the number of protons

What makes an element distinct? A. the number of protons B. the number of neutrons C. the number of electrons D. the total mass of all the particles E. none of these

B. neutron

Which of the following are electrically neutral? A. Proton B. Neutron C. Electron D. Ion E. None of these

A. air

Which of the following is not a compound? A. air B. ammonia C. water D. salt E. all are compounds

D. uranium

Which of these atoms has the most mass? A. hydrogen B. iron C. lead D. uranium E. all have the same mass

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

Which of these statements is true? A. A molecule is the smallest particle that exists B. Chemical elements are made up of about 100 distinct molecules C. Molecules form atoms that in turn determine chemical properties of a substance D. Molecules are the smallest subdivision of matter that still retains chemical properties of a substance E. None of these statements is true

E. None. All of the above choices are mixtures

which of the following is not a mixture? A. granite B. cake C. air D. beach sand E. None. All of the above choices are mixtures