Unit 3 Review (Chemical Bonding)

How many valence electrons does the element oxygen have?

• 1
• 2
• 6
• 7

Tags

NGSS.HS-PS1-1

Which type of bond TRANSFERS electrons?

• ionic
• covalent

When a negative ion is formed, does the particle gain, lose or share electrons?

• gain
• lose
• share

Choose the correct shape for this molecule:

• Trigonal planar
• Trigonal pyramidal
• Tetrahedral
• Linear

What is the shape of the molecule above?

• linear

• bent

• trigonal pyramidal

• trigonal planar

What shape does the molecule above have?

• linear

• bent

• trigonal pyramidal

• tetrahedral

What are valence electrons?

• Electrons in the outermost energy level of an atom

• Electrons closest to the nucleus of an atom

• Electrons in the middle energy levels of an atom

Which definition BEST describes a metallic bond?

• a chemical bond where atoms share valence electrons
• oppositely charged atoms being held together by the electrostatic force
• positively charged nuclei in a "sea" of free-moving electrons

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc
• Copper
• Nickel
• Germanium

Tags

NGSS.HS-PS1-1

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

Tags

NGSS.HS-PS1-1