quiz prep1 lesson1 part2

1-During the formation of a sodium chloride molecule, sodium atom

• a. gains one electron from chlorine atom.

• b. gives one electron to chlorine atom.

• c. gains two electrons from chlorine atom.

• d. gives two electrons to chlorine atom.

2-During the formation of a magnesium oxide molecule, oxygen atom changes into •.........

• a. positive ion and carries one positive charge.

• b. negative ion and carries one negative charge.

• c. positive ion and carries two positive charges.

• d. negative ion and carries two negative charges.

3. The bond in a sodium chloride molecule is.................................. bond.

• a. single covalent

• b. double covalent

• c. triple covalent

• d. ionic

4-A lithium atom (Li) changes into a lithium ion (Li+), which means that it

• a. gains one proton.

• b. gains one electron.

• c. loses one proton.

• d. loses one electron.

5-During the chemical reaction, a magnesium atom (12Mg) loses its outer electrons and changes into

• 
• 
• 
•