Who was the founder of Nobel Peace prize?
a) Albert Einstien
b) Alfred Nobel
c) Washington
d) AulKalam
How many elements are present in the modern periodic table?
a) 92
b) 118
c) 112
d) 10
Elements combine together and form…….
a) atoms
b) molecules
c) isotopes
d) compounds
Explanation:A chemical compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds. A molecule consisting of atoms of only one element is therefore not a compound.
Who discovered atomic Number of an element?
a) Albert Einstien
b) Alfred Nobel
c) Washington
d) Moseley
When Moseley
discovered the atomic number?
a) 1886
b) 1890
c) 1910
d) 1913
Which of the following is used to arrange the elements in the periodic table?
a) atomic number
b) mass number
c) nucleon number
d) No. of isotopes
