"All matter is made of small things called atoms."

This Greek philosopher believed, "all things are made up from 4 elements, Earth, fire, water and air'>

John Daltons measured the masses of the elements and noticed that ratios of the elements in a compound were fixed. He believed that these atoms could not be divided into smaller parts.

This English scientist's model of the atom was called the "Billiard Ball Model".

In his experiment using a special glass vacuum tube he was able to discover the negatively charged subatomic particles of atom that he later named electrons.

In this picture of the atomic model, the electrons, were said to be distributed evenly throughout the positively charged material. This model was called the "Plum Pudding Model", and was created by

While working with Rutherford this scientist discovered the neutrons of an atom.

Using information he knew about positively charged alpha particles in his famous "Gold Foil Experiment", he was able to deduce that atoms have a positively charged center.

He discovered the proton and the nucleus of the atom.

After Rutherford analyzed his observations in his Gold Foil Experiment, he concluded that the atom is made up of mostly empty space and has a positively charged center.

In Thomson's experiment the green glowing beam bent away from the negatively charged plate, telling him that

Hydrogen

phosphorus

silicon

Helium

Lithium

Aluminum

Magnesium

Beryllium

Oxygen

Fluorine

Nitrogen

Carbon

Sodium

Boron

Neon

Sodium has an atomic number of 11. How many protons does it have?

The atomic number tells you the number of protons and

Mass number =

The arrangement of electrons in the energy levels around the nucleus of an atom is called

A pictorial model that shows the valence electrons of an atom.

The electrons in the highest (outermost) energy level of an atom is called

An orbital in an energy level can hold a maximum of

The Octet Rule in atomic structure says that

Most elements on the periodic chart are

The nonmetals are found on the right side of the periodic table.

Metalloids also known as semiconductors, have properties of both metals and

Group 7A or 17 elements are nonmetals called

As you move from left to right across the periodic table the metallic properties

Groups the vertical columns on the periodic chart are all called family's because

The smallest part of an element is the

The outer most electrons of an an atom is represented in the electron dot diagram.

Positive ion

negative ion

The maximum number electrons can an orbital can hold.

The atomic number can tell you the element, number of protons and the number of

The most reactive metals on the periodic table?

The most reactive nonmetals are the

Copper, Gold and Silver are part of the