U3 Chemical Bonding Review

Oxygen (O) atoms will combine with Hydrogen atoms to form water molecules (H2O). Which statement explains the process through which these molecules are formed?

• two oxygen atoms share some of their protons with Hydrogen atoms

• 2 hydrogen atoms share their valence electrons with one oxygen atom

• protons are transferred from one oxygen atom to the other oxygen atom

• electrons are transferred from one hydrogen atom to the other oxygen atom

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When an atom of sodium and an atom of fluorine combine to form a salt compound, sodium fluoride is formed through an ionic bond. Which statement correctly describes the behavior of the valence electron in the ionic bond?

• an electron from the fluorine atom moves to the sodium atom forming 2 ions

• an electron from the sodium atom moves to the fluorine atom forming 2 ions

• an electron from the fluorine atom is shared with the sodium atom forming a sodium ion

• an electron from the fluorine atom is shared with the sodium atom forming a fluorine ion

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Aluminum oxide, Al₂O₃, is produced by combining Al³⁺ and O^2- particles.  What type of compound has been formed?

• ionic

• metallic

• covalent

• molecular

Tags

NGSS.HS-PS1-3

An ionic bond typically forms between certain types of elements.  Which pair of elements will form an ionic compound?

• N and O

• K and Cl

• Na and Cu

• Li and Mg

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NGSS.HS-PS1-3

 Iron oxides, such as rust, form when iron metal reacts with oxygen in the air. What are the chemical symbols for the two elements found in iron oxide?

• I and O

• Ir and O

• Fe and O

• Pb and O

Tags

NGSS.MS-PS1-1

Which part of a sodium atom is transferred when an ionic bond is formed with another atom?

• proton

• neutron

• electron

• outer electron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many elements are in the compound shown in the image?

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

How many atoms are in the compound shown in the image?

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

The compound name formed from the elements calcium and chlorine is known as

• calcite

• chlorine calcide

• calcium chlorate

• calcium chloride

The chemical structure for carbon dioxide is CO₂.  Carbon dioxide is most likely a/an

• element

• diatomic gas

• ionic compound

• covalent compound

Tags

NGSS.MS-PS1-1