STAAR Review Atoms and the Periodic Table

STAAR Review Atoms and the Periodic Table

What is an atom?

Watch the video and be prepared to answer basic questions about the atom.

Poll

The negative particles in an atom are called protons.

• True

• False

Multiple Select

Check the boxes for those parts of the atom that are found in the nucleus.

• protons

• electrons

• neutrons

• electron cloud

Multiple Choice

An atom is identified by the number of---

• neutrons

• protons

• electrons

• mass number

Valence Electrons

What are they?

How do you find them using the periodic table?

Multiple Choice

Valence electrons are--

• electrons found in the nucleus of an atom

• all of the electrons found in the electron cloud

• electrons found on the last energy level of an atom

• electrons found on the first energy level of an atom

Open Ended

The periodic table can be used to quickly find the number of valence electrons. Explain how to use the periodic table to find the number of valence electrons.

The Periodic Table

• How is the table arranged?

• What information can I get from this table?

Using the periodic table to find protons, neutrons and electrons.

To find: protons--look at the atomic number

To find: neutrons--subtract the atomic number from the mass number(be sure to round, no decimals)

To find: electrons--look at the atomic number, they will be the same as the protons--that is why all elements are this periodic table are neutral.

Multiple Choice

How many protons, neutrons, and electrons does Sulfur have?

• 16,32,16

• 32,16,16

• 16,16,16

• 16,16,32

Multiple Choice

How many neutrons does Copper have?

• 29

• 35

• 63.546

• 64

Poll

The periodic table is arranged by --

• the number of neutrons

• increasing atomic number

• increasing mass number