Chapter 5a - Chemical Bonding

What is the number of valence electrons for Oxygen?

• 8
• 6
• 2
• 1

Tags

NGSS.HS-PS1-1

Why do bonds form?

• To fill the valence shell of electrons for the elements involved
• to release energy stored in the bonds
• because whenever you mix two chemicals, there will be a reaction
• because of attraction

Tags

NGSS.HS-PS1-4

What type of bond, showing a free-moving sea of electrons, is illustrated above?

• Metallic
• Ionic
• Covalent
• Wiggly

A charged particle that has gained or lost electrons is called a _____.

• molecule
• ion
• isotope
• element

Magnesium bromide is an ionic compound with the chemical formula MgBr₂.  What does the "2" tell you?

• There are 2 bromide ions for every magnesium ion
• Bromide has a 2- charge
• Bromide has a 2+ charge
• There are 2 magnesium ions to every bromide ion

Tags

NGSS.MS-PS1-1

What is the VSEPR theory used to predict?

• Bond Strength
• Polarity
• Molecular Shape
• Electronegativity

Each line in a Lewis electron-dot structure represents __________ electron(s).

• 3
• 2
• 1
• 4

When writing Lewis electron-dot structures, only the __________ electrons are used.

• Inner shell
• Core 
• Valence
• Stable

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Organize these options into the correct bond types (5pts)

Groups:

(a) Ionic Bonds

,

(b) Covalent Bonds

,

(c) Metallic Bonds

• Low Melting Points

• Transfer Electrons

• Polar and Nonpolar Bonds

• Shiny Appearance

• Conduct Electricity as Solids

• Metals + Nonmetals

• High Melting Points

• Nonmetals Only

• Sea of Electrons

• Malleable and Ductile

• Share Electrons

• Form Molecules

• Crystal Geometry

Draw the electron dot structure for the covalent molecule phosphorus trichloride, PCl₃.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2