Chapter 11 Test

The smallest particle into which an element can be divided and still be the same substance is called a(n)?

What particle did J.J. Thompson discover?

How would you describe the nucleus?

Where are electrons likely to be found?

Dalton believed that...

What did Democritus, Dalton, Thompson, Rutherford, and Bohr all have in common?

In Thompson's "plum-pudding" (our chocolate chip cookie dough) model of the atom, the plums (chocolate chips) represent

An atom of gold with 79 protons, 79 electrons, and 118 neutrons would have a mass number of

Which of the following has the least mass?

If an isotope of uranium, uranium-235, has 92 protons, how many protons does uranium- 238 have?

How did Democritus describe atoms?

Calculate the atomic mass of gallium, which consists of 60% gallium-69 and 40% gallium-71.

What element and isotope results from the combination of two Be-10 isotopes?

An atom of carbon with 6 protons, 6 electrons and 6 neutrons would have a mass number of?

In an atom, which has the least mass?

Which was one of Dalton's ideas?

What took place in the late 1880's?

What is the meaning of atom?

Which statement about atoms is true?

Which statement about isotopes is true?

According to Rutherford, what was in the center of an atom?

Which phrase describes radioactive isotopes?

The discovery of which particle proved that the atom is NOT indivisible?

Who proposed this new model of an atom?

The raised surfaces show?

A positively charged particle in the nucleus of an atom is called a(n)

An atom of an element that has the same number of protons but different numbers of neutrons is called a(n)

The smallest particle into which an element can be divided and still be the same substance is a(an)

All substances are made of

Objects are pulled toward one another by ___________ force

Twentieth - Century scientists believe electrons are found in regions called ______

The pushes and pulls between objects are called ______

Because the mass of an _________ is so small, it is usually thought of as almost zero.

A charged particle is called a(n) _________

All atoms of an element have the same

Particle that cannot be cut

Negatively charged particle discovered by Thomson

Central region of the atom

Region where electrons are likely to be found

Particle in the center of an atom that has no charge

Subatomic particle that has a positive charge

A unit of mass that describes the mass of an atom or molecule

The number of protons in the nucleus of an atom

Atom that has the same number of protons but different numbers of neutrons

The sum of protons and neutrons in an atom

Which letter refers to the particle with no charge?

Which letter refers to the proton?

Which letter refers to the particle with a negative charge?

Which letter refers to the nucleus?

What would happen to a nucleus containing two or more protons if the strong nuclear force were absent?