Physical Science Unit 2 Test

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During Chemistry class, Casey performed several lab tests on two white solids. The results of the three tests are available on the data table shown below. Based on this data, Casey has concluded that Substance A must have ____________ bonds.

• No bonds
• Covalent
• Ionic
• Metallic

Elaborate on what can be learned about the properties by the location of the element on the periodic table. Use atomic number 17 as an example.

• It is a non-metal, has 7 valence electrons, becomes a cation with a -3 charge and is a halogen.
• It is a metalloid, has 1 valence electron, becomes a cation with a +1 charge and is an alkali metal.
• It is a non-metal, has 7 valence electrons, becomes an anion with a -1 charge and is a halogen.
• It is a metal, has 7 valence electrons, becomes an anion with a -1 charge and is a halogen.

The valence electrons of carbon and hydrogen are shared in this molecule of methane, making this compound _________________. *

• Ionic
• Metallic
• Covalent
• Highly reactive

What do all of these compounds have in common? *

• They are all ionic bonds
• They are all metallic bonds
• They are all covalent bonds
• They are all highly reactive

What is the correct formula for Lithium Oxide?

• Li2O
• Li2O3
• LiO
• LO

What is the correct formula for Tricarbon octahydride?

• C3H
• C3H8
• CH8
• CH

What is the correct name for MgCl2?

• Monomagnesium dichloride
• Magnesium dichloride
• Magnesium chlorine
• Magnesium chloride

Which of the following would be good conductors of electricity in the molten state? Select all that apply

• CH4
• MgO
• LiF
• NaCl