Q. 1Which of the following statement is NOT a correct statement about the trends when going from left to right across the periods of Periodic Table?
A.The elements become less metallic in nature
B.The number of valence electrons increases
C.The atoms lose their electrons more easily
D.The oxides become more acidic.
Q. 2The element X has the following electron configuration 2, 8, 8, 2. It means that it belongs to:
A.Second period and a second group
B.Fourth period and the fourth group
C.Fourth period and the second group.
D.Second period and fourth group.
Q. 3Three elements Si and Ge are:
D.metal, non-metal and metalloid respectively.
Q. 4Which of the following statements about the Modern Periodic Table is correct?
A.It has 18 horizontal rows known as Periods
B.It has 7 vertical columns known as Periods
C.It has 18 vertical columns known as Groups.
D.It has 7 horizontal rows known as Groups
Q. 5Which of the following is the outermost shell for elements of period 2?