PreAP Chem KC2.2&2.3

When two atoms share electrons, a chemical bond is formed.  This type of bond is called:

• covalent bond
• ionic bond
• crystal bond
• polyatomic bond

A covalent bond in which electrons are shared unequally is:

• polar
• a double bond
• ionic
• polyatomic

Fluorine (F₂) is a(n)  _________________                  molecule because the valence electrons are shared equally between the two fluorine atoms.

• polar
• nonpolar
• ionic
• crystal

How many valence electrons does nitrogen have?

• 3
• 2
• 5
• 1

How many valence electrons does hydrogen have?

• 4

• 3
• 2
• 1

What is the charge on an Aluminum ion?

• 3
• +3
• +2
• +1

An ionic bond happens between what kinds of elements?

• metals and metals
• metals and nonmetals
• nonmetals and nonmetals

What is the VSEPR theory used to predict?

• Bond Strength
• Polarity
• Molecular Shape
• Electronegativity

According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?

• Pairs of valence electrons
• Inner shell electrons
• Mobile Electrons
• Electrons closest to the nucleus

How do covalent bonds form?

• Donating & receiving valence e- between atoms.
• Opposite slight charges attract each other between compounds.
• Scientists are still not sure how they form.
• Sharing valence e- between atoms.