Elements, Compounds, and Mixtures

What determines the order of elements on today's periodic table?

(a)  

• increasing atomic mass
• decreasing atomic mass
• increasing atomic number
• decreasing atomic number

From this element key of Nitrogen, determine the atomic mass of nitrogen

(a)  

• 7
• 7.01
• 14.01
• 21.01

Each horizontal row on the periodic table is called a what?

(a)  

• Group
• Row
• Period
• Family

What is the chemical symbol for Sodium?

(a)  

• S
• So
• Na
• Ca

The vertical (up and down) columns in the Periodic Table are called

(a)  

• groups
• towers
• periods
• atomic numbers

What is the atomic number of Sulfur?

(a)  

• 16
• 2
• 32.065
• 86

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2

What cannot be broken down into other substances?

• Compound
• Mixture
• Solids
• Element

What is made up two or more elements that are chemically combined?

• Element
• Mixture
• Compound
• Solids

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4