Practice Sheets & eNotes-Periodic Classification of Elements

Periodic classification of elements Worksheet-1

1. Mendeleef's periodic law is based on-

A. Atomic weight                          B. Atomic number

C. Number of neutrons               D. None of these

2. The heaviest atom amongst the following is

A. U                     B. Ra                   C. Pb                   D. Hg

Periodic classification of elements Worksheet-2

1. All the elements in a group in the periodic table have the same____.

A. Atomic number

B. Electronic configuration

C. Atomic weight

D. Number of electrons in the outermost shell or valence electrons

2. The most predominantly ionic compounds will be obtained from the combination of elements belonging to _____.

A. 1 and 7 groups                          B. 2 and 6 groups

Periodic classification of elements Worksheet-3

1. Which of the following statements is correct?

A. Sodium atom is larger in size than Potassium atom

B. Sodium atom is larger in size than Lithium atom

C. Chlorine atom is larger in size than Sodium atom

D. Aluminium atom is larger in size then a sodium atom

2. An atom of an element has electronic configuration 2, 8, 1. Which of the following statement is correct?

A. The valency of element is 7

B. The element exists as a diatomic molecule