ASSESSMENT

It is an electrostatic force of attraction which holds the two oppositely charged ions together.

• covalent bonds

• ions

• atoms

• ionic bonds

________is an atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons.

• Ions

• Atoms

• Molecules

• Sub-atomic particles

Atoms are electrically neutral, it is because an atom contains the same number of positively charged protons and negatively charged electrons.

• TRUE

• FALSE

Nonmetal atoms tend to lose electrons during a chemical reaction.

• TRUE

• FALSE

Metal atoms tend to lose electrons during a chemical reaction.

• TRUE

• FALSE

Which two types of elements can react and form an ionic compound?

• A metal and a nonmetal

• A metal and another metal

• A nonmetal and another nonmetal

Which of the following chemical substances could be reacted together to form an ionic compound?

Beryllium

Bromine

Water

Helium

Sodium chloride

Aluminum

• Beryllium and bromine

• Sodium chloride and bromine

• Beryllium and helium

• Aluminum and beryllium

• Bromine and helium

The diagram shows the outer electrons of an atom of the element sodium and an atom of the element sulfur.

Which of the following statements summarizes what happens when sodium forms an ionic compound with sulfur?

• Two atoms of sodium react with two atoms of sulfur.

• One atom of sodium reacts with one atom of sulfur.

• Two atoms of sodium react with one atom of sulfur.

• One atom of sodium reacts with two atoms of sulfur.

What happens to the electrons when sodium forms an ionic compound with sulfur?

• The electrons are shared between the sodium atoms and sulfur atoms.

• The electrons are transferred from sulfur atoms to sodium atoms.

• The electrons are transferred from sodium atoms to sulfur atoms.

What type of attraction exists between a positive ion and a negative ion in an ionic bond?

• Electronic attraction

• Magnetic attraction

• Covalent attraction

• Metallic attraction

• Electrostatic attraction