Atomic Structure

Elements that have same the atomic number but different mass numbers

Experiments with a sealed tube proved that there were smaller particles within the atom

Which subatomic particle has no charge?

The first energy level has 1 orbital and can hold ___ electrons.

When all the electrons in an atom have the lowest possible energies, it's in its

Which subatomic particle has a 1+ charge?

The 4th energy level has 16 orbitals and can hold ___ electrons.

An ____ is a region of space around the nucleus where an electron is likely to be found.

Three subatomic particles

The possible energies that electrons in an atom can have are called

A visual model of the most likely locations for electrons in an atom.

Since each atom must be neutral the atomic number also tells us the number of ____ in an atom.

Bohr's model focused on the electrons. He had them in fixed orbitals around the nucleus like a

Which 2 subatomic particles have relatively the same mass?

Mass number

Which subatomic particle has a 1- charge?

Performed the gold foil experiment that proved there are positive charges in center of atom

Which subatomic particles are found in an atom's nucleus?

Greek philosopher coined the term atom, from atomos meaning "uncut"

Carbon has an atomic number of 6

Scientist credited with discovering neutrons in 1932

Carbon has an atomic # of 6 and a mass # of 12

Proposed the theory that all matter is made up of individual particles called atoms

The atomic number of an element equals the number of ____ in an atom of that element.

Proposed the "plum pudding" model for the atom, or the chocolate ice cream model (YUM!!)