Exam Review - Atomic Theory to Ions

Dalton believed that...

How many electrons does Al ³⁺ have?  Aluminum is number 13 on the periodic table.

Where are electrons likely to be found?

How many neutrons are there in a Carbon-14 atom?

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

Who was the influential person that said Democritus was wrong?

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

In Thomson's "plum pudding" model, the plums represent

The modern atomic theory includes the _______________ model.

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

The mass number is equal to the sum of the 

If a neutral atom loses two electrons, what will its charge be?

An atom that has an unequal number of protons and electrons is a(n)

Rutherford believed that each atom has a positively charged ____________ at the center.

The model that shows electrons orbiting the nucleus in paths or orbits is called the:

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

The region of an atom that contains all of the mass is called:

What is the name of Thomson's model of the atom?

The smallest particle into which an element can be divided and still be the same substance:

What particle did J.J. Thomson discover?

The number of protons in an atom determines its