Chemistry (STAAR)

Periodic table

100

Periods only have this in common

Energy Levels

200

These vertical columns on the periodic table are also known as

Groups or Families

300

Atomic number is equal to the 

Number of protons and electrons

400

Group or family number determines the number of

Valence Electrons

500

In order to calculate the number of neutrons you need to subtract these

The atomic number and the atomic mass

Chemical Reactions

100

This law states that matter can cannot be created or destroyed

Law of Conservation of Mass

200

Chemical reactions are represented by chemical equations, what are the elements or compounds on the left side of the arrow called?

Reactants

300

Chemical reactions are represented by chemical equations, what are the elements or compounds on the right side of the arrow called?

Products

400

The mass of the reactants must be equal to the mass of the products in order for the equation to be

Balanced

500

Name any of the five different types of evidence that a chemical reaction has occurred

Temperature change, Precipitate Forms, Gas, Smoke  or Bubbles form, Color change or Light is given off.

Atomic Structure

100

Positive subatomic structure

Protons

200

Negative subatomic particle

Electron

300

The atomic mass is composed of these 2 subatomic structures

Protons and Neutrons

400

This subatomic structure will always positively give you the elements identity

Protons

500

The number of valence electrons determines an elements  

Reactivity

Guess Who?

100

I have 3 valence electrons and three energy levels who am I

Aluminum

200

I have 1 valence electron and 4 energy levels who am I

Potassium

300

I have 8 valence electrons and 2 energy levels who am I

Neon

400

I have 6 valence electrons and 3 energy levels who am I

Sulfur

500

I have 4 valence electrons and 2 energy levels who am I

Carbon

Count

100

How many different elements in the following compound: C₆H₁₂O₆

3 (carbon, hydrogen and oxygen)

200

How many atoms of hydrogen in the following compound: NH(OH)₃

4

300

How many molecules of water are present in the following formula: 3H₂O

3 molecules

400

How many atoms in total in the following compound of Tylenol: C₈H₉NO₂

20 atoms

500

How many atoms in the following molecules for antiperspirant: 2Al₂Cl(OH)₅

26 

Al=4    O=10

Cl=2    H=10