What is the
common name of elements present in group VIIIA?
a) the alkali metals
b) the alkaline earth metals
c) the halogens
d) the noble gases
Explanation:noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Which of the
following elements are generally most reactive elements in the periodic table?
a) the alkali metals
b) the alkaline earth metals
c) the transition metals
d) the lanthanides
Which of the following elements react rapidly with air and moisture?
a) the alkali metals
b) the alkaline earth metals
c) the halogens
d) the actinides
Where the alkali metals are kept to avoid from reaction with air and moisture?
a) in water
b) in soil
c) under oil
d) none of these
Which of the following are so soft that can be cut with a knife?
a) transition metals
b) noble metals
c) alkali metals
d) coinage metals
Why group IIA elements are called the alkaline earth metals? Because;
a) they found in the earth crust
b) they found in the sea water
c) they found in animals rocks
d) both a and b
