Chemical bonding

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

• molecule
• ion
• isotope
• element

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

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

Name this compound: LiO

• lithium oxide
• oxygen monolithium
• monolithium dioxide
• dilithium dioxide

What charge does a potassium (K) ion have?

• +1
• -1
• +2 
• -2

Why do all bonds form?

• To fill up the outer shell.

• To achieve the one or duplet electronic configuration

An atom with 1 valence electron 'needs' a full shell, so it can either gain 7 electrons or lose 1. Which is more likely to occur?

• lose 1 electron

• gain 7 electrons