Ch.6 Exam Review

What are all substances made of?

Smallest particle into which an element can be divided into & still have properties of element

What do you call an atom that has an unstable nucleus?

Protons are _________ charged particles.

Atoms that are _________ of each other are always the same element.

What did Rutherford believe was in the center of the atom?

Neutrons have __________ charge.

Atoms that have the same number of protons but have different number of neutrons are...

Every atom of a given element has the same number of 

Dalton believed that...

What did Democratus, Dalton, Thomson, Rutherford, and Bohr all have in common?

Which of the following was one of Dalton's ideas?

_______ are atoms that have the same number of protons but different number of neutrons.

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

Where is the nucleus found?

What is the meaning of the word atom?

The ________ _______ keeps a nucleus with two or more protons from flying apart.

In Thomson's plum-pudding model of the atom, the plums represent

What 2 items can be found in the nucleus?

The ________ represents the sum of protons in the nucleus of an atom.

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

The current atomic theory includes the __________________ model.

Particle in the nucleus with no electrical charge

The nucleus is the small, dense, ___________ charged center of the atom.

Electrons are ___________ charged particles.

What particle did J.J. Thomson discover?

Which statement about atoms is true?

What are the three subatomic particles?

The ______ enables a neutron to change into a proton and an electron in certain unstable atoms.

What is an atom?

What kind of charge do electrons have?

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

In an atom, which has the least mass?

How many forces are there that work together to give an atom its structure and properties?

Which of the following took place in the late 1800's?

The weighted average of all the naturally occurring isotopes of an element is called the