CHEM Day 4 12/11 Unit 4: Chemical Bonding

What is the name given to the electrons of an atom, which are available for chemical bonding?

• orbital electrons

• valence electrons

• anions

• cations

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How do metals obey the octet rule when reacting to form compounds?

• they gain electrons

• they lose all of their valence electrons

• they lose some of their valence electrons

• they share electrons

How do nonmetals obey the octet rule when reacting to form compounds?

• they gain electrons

• they lose electrons

• they share electrons

• nonmetals do not obey the octet rule

Which of the following occurs in an ionic bond?

• valence electrons are shared

• Two atoms share two electrons.

• Oppositely charged ions attract.

• Like-charged ions attract.

HCl is an example of

• covalent bond

• metallic bond

• ionic bond

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

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

Which group of elements have full outer shells?

• The alkali metals
• The full gases
• The halogens
• The noble gases

Tags

NGSS.HS-PS1-1

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

How many electrons does each line indicate are shared?

• 1
• 2
• 3
• 4