Periodic Table Basics PreTest

The electrons involved in the formation of a chemical bond are called

• dipoles

• electrons

• lewis structures

• valence electrons

When combined, atoms are

• more stable

• less stable

• very magnetized

• doubled in potential energy

A chemical bond resulting from the attraction between positive and negative ions is called

• covalent bond

• ionic bond

• charged bond

• dipole bond

Which type of bond would form between oxygen and nitrogen?

• ionic

• metallic

• covalent

• standard

The valence electrons in metals are generally ___________

• shared with the nonmetal

• transferred to a nonmetal

• gained from a nonmetal

• transferred to another metal

How would electrons be involved in the bonding of Magnesium and Oxygen?

• Magnesium would lose electrons

• Magnesium and oxygen would share electrons

• Oxygen would lose electrons

• Magnesium would gain electrons

Which of the following best explains why noble gases do not form compounds?

• They have full valence electron levels which makes them highly reactive.

• They have full valence electron levels which mean they are not reactive at all.

• They only need one valence electron which keeps them from forming compounds.

• They only need two valence electrons which makes them unreactive.

Why does an atom of Magnesium lose two electrons rather than gain six?

• It takes more energy to lose two than gain six

• It’s just a random decision, same energy required

• It takes less energy to lose two than gain six.

• Magnesium needs to have a negative charge.

Which of the following elements will most likely lose electrons and take on a positive 2 charge?

• Magnesium

• Oxygen

• Hydrogen

• Helium

How many valence electrons are in an atom of Silicon?

• 2

• 4

• 6

• 8