Bonding and properties of matter

Choose all correct answer choices

• Elements ionize to gain or lose electron

• +2 is the oxidation number for the Alkali metals

• -3 represents the gaining of 3 valence electrons by Aluminum to become stable

• Noble gases have a stable electron configuration because they have 8 valence electrons

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Salt is placed in water and dissolves. This is because?

• Salt is soluble in water

• Water is soluble in salt

• Salt is insoluble in water

• None of the above

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NGSS.MS-PS1-2

Choose all answers that are correct.

• The image is a crystal lattice

• Ionic and covalent molecules can form crystal lattice

• The image is a covalent electron

• The image could represent salt

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Physical or chemical change?
cutting a piece of paper in half

• Physical
• Chemical

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How are physical and chemical properties different?

• Chemical properties only apply to chemicals. Physical properties apply to everything.
• Chemical properties are only observable as the substance is changing. Physical properties are easily observed or measured.
• Chemical properties are easy to reverse, and physical properties cannot be reversed. 

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Matter is ____________

• Anything that has mass and takes up space.

• The property of attraction to a magnet.

  How dense something is compared with a reference material. Sink or Float

• Measurement of the ability of a solid to dissolve in a liquid.

• Energy that can be measured by a thermometer.

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What type of bond forms when 2 or more electrons are SHARED?

• Covalent bond
• Incomplete bond
• Ionic bond
• Metallic bond

Which of the following is an example of an IONIC COMPOUND?

• NaCl
• H₂O
• CO₂
• NO

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NGSS.MS-PS1-1

Which of the following is an example of a COVALENT COMPOUND?

• H₂S
• KI
• CaCl₂
• MgO

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NGSS.MS-PS1-1

What charge does a bromine (Br) ion have?

• -1
• -2
• -3
• -4

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