Bonding Unit Practice Test

Which of the following is a correct Lewis Dot diagram for an ionic bond?

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Which of the following are true regarding this element's 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 readily accept an electron.

• It represents an element that is metallic.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is a correct Lewis Dot diagram for a covalent bond?

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What is a Lewis valence e-dot structure?

• a representation of the valence electrons arranged around the nucleus of an atom

• a model to predict the mass of the molecule

• a representation of the protons in an atom

• a list of where all the electrons are located in an atom

Which particles are represented by the dots in Lewis valence e-dot structures?

• core electrons

• valence electrons

• protons

• all electrons

Tags

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)? Select TWO correct answers.

• 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.

• Eight 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.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following statements are true regarding Lewis Dot Structures? Select TWO correct answers.

• The mass number determines how the electrons will be arranged.

• They illustrate valence electrons with dots.

• They represent how valence electrons are distributed around atoms.

• The dots represent the protons and neutrons in the nucleus.

• All electrons are shown in a Lewis Dot Structure.

Alkaline earth metals are NOT found in their free state in nature. Their electron configurations contain two outer electrons. Because they easily give up these two outer electrons, what type of bond do they typically form?

• covalent

• hydrogen

• ionic

• metallic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement BEST describes how potassium bonds with bromine?

• Potassium will donate an electron to bromine.

• Bromine will donate an electron to potassium.

• Bromine will donate seven electrons to potassium.

• Potassium will share seven electrons with bromine.

Tags

NGSS.HS-PS1-2

Which of these is a correctly drawn electron dot formula for ammonia (nitrogen trihydride)?

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