Matter Lesson 7: The Periodic Table

The periodic table has rows and columns that organize the elements by similarities. What is the name for a row in the periodic table?

• family
• group
• period
• section

Jamal found a solid substance that is shiny, malleable, and a good conductor of thermal energy. Which of the following kinds of elements have properties similar to those of the substance Jamal found?

• gases
• metalloids
• metals
• nonmetals

Webb is testing samples of different elements. One sample is a dull, yellow solid that breaks into powdery pieces when he hits it with a hammer. How should Webb classify the yellow solid?

• as a gas
• as a metal
• as a metalloid
• as a nonmetal

Which of the following describes how elements are arranged in the periodic table?

• by decreasing atomic mass
• by increasing atomic number
• by chemical name
• by repeating atomic number

Find chlorine and bromine in this section of the periodic table. What is true about these two elements?

• They are both metalloids.
• They are in the same period.
• They have the same average atomic mass.
• They are in the same group.

Which of the following information is false?

• The atomic number for Silicon is 14
• The mass number for Silicon is 14
• The mass number for Silicon is 28.086
• The number of proton in an atom of Silicon is 14

The prefix semi-means "partly." Based on your knowledge of the properties of elements, which kind of element is most likely used to make semiconductors?

• liquids
• metalloids
• metals
• nonmetals