3. How many electrons must be lost given the following atoms (Ca, Mg, Ba, Be)
to attain a noble gas configuration?
a. 1
c. 3
b. 2
d.4
4. How many electrons must be gained by each element (CI, F. Br. 1) to achieve
stable configuration?
a. 1
C. 3
b. 2
d.4
5. Covalent bond is formed by combining
a. two metallic elements.
c. metal and nonmetal.
b. two nonmetal elements.
d. two noble gases.​