periodic table

Mendeleev arranged the elements according to increasing?

• atomic number

• density
• melting point
• mass

Match the Following!

• periodic law

• is the only metal that is a liquid at room temperature.

• group

• The horizontal row on the periodic table is called a

• period

• This class of elements are sometimes called "semiconductors."

• mercury

• The vertical column on the periodic table is called a

• metalloids

• A rule that states that repeating chemical and physical properties of elements change periodically with the atomic number of the elements is the

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

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

What group of elements are in the center of the periodic table and don't have individual names?

• Alkaline-earth Metals
• Transition Metals
• Alkali Metals
• Halogens

Most of the elements on the periodic table are classified as _____ and are on the left and middle of the table.

• Metals
• Nonmetals
• Metalloids
• Periods

What does 12.011 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

What does the C represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

Which one of these is not a noble gas?

• Helium
• Radon
• Iodine
• Krypton

Periodic law states that the elements are arranged according to their atomic ________ so that elements with similar chemical properties are in the same ________ and properties repeat periodically.

• numbers, rows

• masses, rows

• masses, column

• numbers, column

___________ is the only metal that is a liquid at room temperature.

• Platinum
• Water
• Tin
• Mercury