Periodic Table
Types of Bonds
Properties of Matter
Nomenclature
Balancing Equations
200

Which group of elements are the noble gases?

18

200

Which bond has atoms share electrons?

Covalent

200

What is the smallest unit of matter?

An atom

200

What is the formula for water?

H₂O

200

Balance the equation: H₂ + O₂ → H₂O.

2H₂ + O₂ → 2H₂O

400

What is carbon's atomic number?

6

400

What is an ionic bond?

Ionic bonds involve a metal and a nonmetal. These are formed when one atom transfers an electron to another.


400

What is density?

D = M/V. The mass of an object in relation to its volume.

400

What is CO₂ called?

Carbon dioxide

400

Balance the equation: N₂ + H₂ → NH₃.  

N₂ + 3H₂ → 2NH₃

600

Who created the first periodic table?

Dmitri Mendeleev

600

Is H₂O a polar or nonpolar bond?

Polar.

600

What is a physical change?

A change that does not affect the chemical structure of a material, but rather a reversible change such as changes in state of matter or shape or texture. 

600

What is NaCl called?

Sodium chloride

600

Balance the equation: C₃H₈ + O₂ → CO₂ + H₂O.

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

800

The most electronegative element. This is commonly used in toothpaste to prevent cavities. Guess the element.

Fluorine

800

Describe a metallic bond.

A bond that occurs between two metals. Electrons become delocalized and a sea of electrons forms.

800

What is the difference between a homogeneous and a heterogeneous mixture?

Homogeneous mixtures have even distributions whereas heterogeneous mixtures have uneven distributions. 
800

What is the formula for sulfuric acid?

H₂SO₄

800

Balance the equation: Al + O₂ → Al₂O₃.

4Al + 3O₂ → 2Al₂O₃

1000

How does the electronegativity of atoms change across a period and why?

Electronegativity will increase across a period, except for noble gases. As you move across a period, atoms will have more protons in their nucleus, which creates a greater attraction for other electrons. Noble gases already have a full valance shell so they do not attract electrons and have no electronegativity.

1000

Why are metallic bonds good conductors?

Metallic bonds are good conductors because of their sea of electrons. They have delocalized electrons that move around freely and act as good conductors.

1000

This transition metal is magnetic and reacts with oxygen and moisture to form a red and brown compound. Which atom is it?

Iron (Fe)

1000

Why are prefixes important when naming covalent compounds?

Prefixes are necessary to include when naming covalent compounds because they indicate the number of atoms within a molecule. 

1000

Balance the equation: C₈H₁₈ + O₂ → CO₂ + H₂O

2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O