Lesson on Atoms

Molecules and atoms

by Jonathan Santamaria

Atoms are the smellest particles of matter

​Atoms have a nucleus in which protons and neutrons are located. Outside the nucleus atoms have electrons, organized in energy levels, and moving in different wave patterns around the nucleus

Multiple Choice

What do we call the center of the atom?

• downtown

• nucleus

• village

• plaza

Multiple Choice

What's in the nucleus of the atom?

• The brain of the atom

• The computer system

• Neutrons and Protons

• Grey Matter

Multiple Choice

How are electrons organized around the nucleus of the atom?

• By size

• By color

• By energy levels

• By the day they were born

There are 118 different kinds of atoms

Atoms are organized in the table of elements by valence.

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​Valence is the number of electrons atoms have in the most outward energy level orbit

Multiple Choice

Where are all the atoms organized?

• In the dctionary

• On the periodic table

• On the map of the worls

There are 118 different kinds of atoms

Multiple Choice

Where can we see al the different atoms?

• In the Periodic Table

• In the physics book

• on TV

• In the dictionary

The atomic number is the number of protons an atom has in its nucleus

This is the symbol for sulfur. It's atomic number is 16

Multiple Choice

What does the atomic number show?

• Number of electrons

• Number of Protons

• Number of neutrons

• number of molecules

The atomic mass is the number of protons and neutrons an atom has in its nucleus

This is the symbol for sulfur. It's atomic mass is 32.065 atomic units. This is the mass of a sulful atom

Multiple Choice

What does the atomic mass tell us?

• Sum of protons and neurons

• Sum of electrons and protons

• number of neutrons

• Sum of electrons and protons and neutrons