Chemical Formulas & Periodic Table

How many Aluminum atoms are in 4 Al₂O₃?

• 4

• 2

• 8

• 3

How many Carbon atoms are in CaCO₃

• 1

• 2

• 3

• 4

Number of hydrogen atoms in 3(NH₄)₂CrO₄

• 12

• 4

• 8

• 24

How many molecules are represented by the following chemical formula?

4Fe₂(CO₃)₃

• 1

• 2

• 3

• 4

How many different elements are there in Cobaltite? The chemical formula is CoAsS

• 2

• 3

• 4

• 5

Magnesium, Phosphorous, and Chlorine all have the same number of

• Protons

• Energy Levels

• Valence Electrons

• Neutrons

Beryllium, Magnesium, and Calcium all have the same number of

• Protons

• Energy Levels

• Valence Electrons

• Neutrons

Helium is in column 8a(18) because it has

• 8 Valence Electrons

• 1 Energy Level

• A full valence shell

• Equal Protons and Neutrons

Which of the following elements is the most reactive

• Sodium

• Boron

• Carbon

• Neon

Which of the following Elements are the most reactive?

• Carbon

• Neon

• Aluminum

• Fluorine