Which of the following is on the left top corner in the periodic table?
a) Hydrogen
b) Helium
c) Lithium
d) Francium
Which of the following is on left end of the second row in the periodic table?
a) Hydrogen
b) Helium
c) Lithium
d) Francium
What is the atomic number of Hydrogen?
a) 1
b) 2
c) 3
d) 10
What is the atomic number of Helium?
a) 1
b) 2
c) 3
d) 10
What is the atomic number of Lithium?
a) 1
b) 2
c) 3
d) 10
Which of the following is called periods in the periodic table?
a) vertical column
b) horizontal rows
c) oblique rows
d) none of these
