physics chapter 11

How many individual atoms are in a water molecule?

3

A nucleus with an atomic number of 44 and a mass number of 100 must have

56 neutrons.

As the text cites, atoms are incredibly tiny, numerous, perpetually moving, and what else?

Ageless

Which of these atoms has the largest number of neutrons in the nucleus? Helium Hydrogen Gold Carbon

Gold

Which of these statements is true?

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

Which of the following is not a compound? ammonia salt air water

air

A molecule has... energy. structure. mass. all of these

all of these

Which contains more atoms: 1 kg of lead or 1kg of aluminum?

aluminium

A positron orbiting an antiproton would make up an atom of

anti-hydrogen

The periodic table of the elements is a list of _______.

atoms

If two protons and two neutrons are removed from the nucleus of an oxygen atom, what nucleus remains?

carbon

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

carbon

A force that determines the chemical properties of an atom is a(n)

electrical force.

The chemical properties of matter come mostly from its

electrons

When carbon and oxygen atoms combine, energy is

given off by the reaction

An important feature of atoms is that they _______.

have wave properties

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

helium

Which of the following is an element? A supernova H2O Hydrogen Carbon dioxide

hydrogen

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

mostly empty space themselves.

The charge in the nucleus of an antimatter hydrogen atom is _______.

negative

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

neon

Which of the following are electrically neutral?

neutron

If no molecules in a body could escape, would the body have any odor?

no

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

orbital electrons.

Dark matter is considered to be _______.

plentiful in the universe

What element results if two protons and two neutrons are ejected from a radium nucleus?

radon

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

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 or photograph an atom.

What makes an element distinct?

the number of protons

Atoms heavier than helium were made by

thermonuclear fusion

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

uranium

Which of the following is not an element: hydrogen, carbon, oxygen, water?

water