Chemistry Quiz

Which of the following types of bonds has a high melting and boiling points?

• ionic bond

• covalent bond

• triple bond

• atomic bond

Why does the element sodium (Na) easily form compounds? Select TWO correct answers.

• Sodium (Na) has just one valence electron which is easily lost.

• Group 1 elements are the least reactive and form compounds easily.

• Sodium (Na) is found in the most reactive period.

• Losing one electron allows it to bond for stability.

• Gaining one electron creates a stable electron arrangement.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

When elements from Group A combine with elements from Group C, these compounds form —

• metallic compounds

• covalent compounds

• transition metals

• ionic compounds

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following are true regarding this electron dot structure? Select TWO correct answers.

• It represents an element that is classified as a noble gas.

• It represents an element that is from the halogen group.

• It represents an element that will readily give an electron away.

• It represents an element that will easily accept an electron.

• It represents an element that is a metal.

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NGSS.HS-PS1-1

Based on their Lewis Dot Diagram, which of the following "elements" could be considered a metal?

• A.

• B.

• C.

• D.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Examine the Lewis Dot Structure for potassium iodide. Why are there 8 dots around the symbol for iodine (I)?

• Each dot represents a covalent bond, of which there are 8 in potassium iodide.

• The valence electrons from potassium combine with those for iodine, adding up to 8.

• Each dot represents an ionic bond, of which there are 8 in potassium iodide.

• Six electrons is the maximum to fill the outer shell for this compound.

• Each dot represents the number of protons in the nucleus of both atoms.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The Lewis dot structure determines the molecular geometry based on bonded and unbonded electrons. What is the expected molecular geometry for CO₂?

• Bent

• Linear

• Tetrahedral

• Trigonal planar

How many single bonds are found in a CH₄ molecule?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

What is the molecular geometry for CH₄ according to VSEPR?

• bent/angular

• linear

• tetrahedral

• trigonal planar

According to the Valence Shell Electron Pair Repulsion (VSEPR) Theory, which of the following chemicals would most likely have the shape of the model seen above?

• CO

• SO₄

• CH₄

• SO₃