Competency 2 QUEST Review - Chemistry

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

How are covalent bonds explained?

• When one atom takes the other atom's electron
• When the atom shares an electron with an another atom
• When the two nucleus merge
• When the neutrons leave the nucleus

How many are shared in a single bond?

• 2 pairs
• 4
• 2
• 1

How are ionic bonds formed?

• When atoms share an electron
• When opposite charged atoms attract
• When one atom takes a proton
• When one atom takes a neutron

Why do ionic bonds form?

• so the number of protons equals the number of electrons
• to fill the outermost energy level
• so an atom can become unstable

Ionic Bonding involves...

• The transfer of protons
• The transfer of nuetrons 
• The transfer of electrons
• None Of the above

What happens when the sodium atom loses an electron?

• It become negatively charged 
• It become positively charged
• none

What is the atomic number?

• number of protons
• number of neutrons

What is the mass number?

• the number of protons
• the sum of the number of protons and the number of neutrons in the nucleus of an atom 

an electron has this charge

• positive
• negative
• neutral