Periodic Table

The horizontal row on the periodic table is called a

• group
• family
• period
• atomic number

How did Mendeleev arrange the elements?

• alphabetical 
• density
• melting point
• atomic mass

Dimitri found that there was a pattern of properties that repeated every ____ elements.

• 2
• 4
• 5
• 7

A vertical column is called...

• group
• tower
• period
• crew

Which of the following is the most metallic element in period 3?

• Boron (B)
• Sodium (Na)
• Argon (Ar)
• Silicon (Si)

Which of these element is the least metallic?

• Potassium (K)
• Carbon (C)
• Sulfur (S)
• Neon (Ne)

How many elements follow the periodic law?

• 7
• 98
• 110
• All of them

Pure forms of these elements are stored in oil so they won't react with oxygen and water in the air.

• Alkali Metals
• Alkaline-earth metals
• Halogens
• Noble Gases

This class of elements are sometimes called "semiconductors."

• Metals
• Nonmetals
• Metalloids
• Groups

In which block, does the element Iron stand?

• d block

• p block

• s block

• f block