5. An element X is placed in the 4th period and in the group 13 in the periodic table. The atomic number of the element X is:(a) 28(b) 29(c) 23(d) 31

5. An element X is placed in the 4th period and in the group 13 in the

1.	5. An element X is placed in the 4th period and in the group 13 in the periodic table. The atomic number of the element X is:(a) 28(b) 29(c) 23(d) 31
Answer» galium is PLACED in the 4th PERIOD and in the GROUP 13.the ATOMIC no of galium is 31