Atoms, Elements and The Periodic Table

The history of the Atomic Theory involves many changes from its early form. Theories change because

• people decide to no longer agree with them.

• all theories must be changed after a certain time.

• new evidence is found that allows the theory to be changed.

• when scientists die, their theories are always changed.

If an atom has an atomic mass of 11 and contains 5 electrons, its atomic number would be______

• 11

• 5

• 6

What is the chemical symbol for Lithium?

• H
• He
• Li
• N

Column in the Periodic Table are called

• Periods

• Groups/Families

• Cousins

• Metals

Rows in the Periodic Table are called

• Periods

• Groups/Families

• Cousins

• Metals

Most of the elements on the periodic table are classified as "metal".

• True
• False

All matter is made of

• atoms
• cells

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

How many neutrons are in one atom of Beryllium?

• 4

• 9

• 5

• 2

A nucleus of an atom contains what two parts?

• Electrons and Protons

• Neutrons and Electrons

• Protons and Neutrons