Atomic Matter

Which of the following is not a mixture?

(granite, cake, and air) all are mixtures

A molecule has

(mass, structure, and energy) all of these

The air in this room has

(mass, weight, and energy) all of these

In our part of the universe, antimatter is

(non-existent, short-lived) two of these

Compared to the mass of a hydrogen atom, the mass of an oxygen atom is

16 times as great

What is the molecular mass of a water molecule?

18 amu

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?

2

If a gram of antimatter meets a kilogram of matter, the amount of mass to survive is

999 grams

An atomic mass unit (amu) is 1/12 the mass of

a carbon atom

Which of the following is not a compound

air

If an astronaut landed on a planet made of antimatter, there would be an explosion as bothe the astronaut and

an amount of planet matter equal to that of the astronaut would annihilate

Which is the smallest particle listed below?

an electron

Nuclei of atoms that make up a newborn baby were made in

ancient stars

A positron orbiting an antiproton would make up an atom of

anti-hydrogen

If a pair of helium nuclei are fused together, the result is

beryllium

In a closed bottle are a certain number of hydrogen molecules. In a 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

both the same

If two protons are removed from an oxygen nucleus, the result is

carbon

Which of these forces determines the chemical properties of an atom?

electrical force

The chemical properties of matter comes mostly from its

electrons

The volume of matter comes mostly from its

electrons

When carbon and oxygen atoms combine, energy is

given off by the reaction

If one neutron is added to a helium nucleus, the result is

helium

Which has the greatest number of protons in its nucleus?

lead

Which of these statements is true?

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

The reason a granite block is mostly empty space is that the atoms in the granite are

mostly empty space themselves

To change mercury into gold, a pair of protons must be

neither of these (removed from the mercury nucleus and added to the mercury nucleus)

If two protons are added to an oxygen nucleus, the result is

neon

Which of the following is electrically neutral?

neutron

Atoms heavier than hydrogen were made by

nuclear fusion

Solid matter is mostly empty space. The reason solids don't fall through one another is because

of electrical forces

In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of

orbital electrons

The weight of matter comes mostly from its

protons

Brownian motion has to do with the

random motions of atoms and molecules

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 breath

single breath

If we doubled the magnifying power of the most powerful optical microscope in the world, we would

still not be able to see an atom

The factor that determines whether a substance is in the solid, liquid, gaseous, or plasma state is its

temperature

What makes an element distinct?

the number of protons

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

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

the same age

There are about as many atoms of air in our lungs at any moment as there are breaths of air in the atmosphere of

the whole world

Which of these statements is true?

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

How many different elements are in a water molecule?

two

Which of these atoms has the greatest amount of electrical charge in its nucleus?

uranium

Which of these atoms has the greatest number of electrons?

uranium

Which of these atoms has the most mass?

uranium