Chemical Bonding

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

• molecule
• ion
• isotope
• element

Nitrogen, N, will form which of the following ions?

• N

• N^-3

• N^-5

• N⁺⁵

Write the correct chemical formula for Ag ⁺  and  Br ^-

• AgBr
• silver bromide
• Ag₂Br₂
• gold bromide

Write the correct formula for an ionic compound formed from S^2- and Rb¹⁺.

• SRb₂
• SRb
• Rb₂S
• RbS₂

What will be the charge of a bromine ion?

• +7

• -7

• -1

• +1

What molecule is this?

• CO
• CO2
• C2O
• C2O2

What region of the periodic table contains atoms that form covalent bonds?

• the left side
• the middle
• the right side
• top left

In chemical compounds, covalent bonds form when

• the electronegativity difference between two atoms is very large.
• electrons are completely transferred between two metals.
• pairs of electrons are shared between two nonmetal atoms.
• two nonmetal atoms are attracted to each other by opposite charges.

Which of the following is an example of an IONIC COMPOUND?

• NaCl
• H₂O
• CO₂
• NO

Which of the following is an example of a COVALENT COMPOUND?

• H₂S
• KI
• CaCl₂
• MgO