MEDIUM
9th ICSE
IMPORTANT
Earn 100

Consider the part of periodic table given below and answer the following questions. 
Group Period 1 2 13 14 15 16 17 18
I
II
III
IV		 a
b
c
d		 e
 		   f   g
 		 h
i		 j
k
l
 

How many valence electrons does 'g' have?

Important Questions on The Periodic Table

MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 37
Consider the part of the periodic table given below and answer the following questions. 
Group Period 1 2 13 14 15 16 17 18
I
II
III
IV		 a
b
c
d		 e
 		   f   g
 		 h
i		 j
k
l
 

Name which is a metalloid. 

MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 38
Three elements A, B and Chave 3, 4, and 2 electrons, respectively. Give the group number to which they belong in the modern periodic table. Also, give their valencies.
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 39
An element X (atomic number 17) reacts with an element Y(atomic number 20) to form a divalent halide.
What is the position of elements X and Y in the periodic table?
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 39
An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a divalent halide.
What will be the nature of oxide of element Y? Identify the nature of bonding in the compound formed.
 
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 40
Mention any three characteristics of halogens. 
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 41
The three elements X, Y and Z with similar chemical and physical properties have atomic masses A, B and C. Mass of Y ( i.e. B) is approximately equal to the average atomic masses of X ( i.e., A) and Z ( i.e., C). What will you call such an arrangement of elements? Also give an example.
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 41
Which group of elements could be placed in Mendeleev's periodic table without disturbing the original order? Give reason.
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 42
Mendeleev predicted the existence of certain elements not known at that time and named two of them as eka-silicon and eka-aluminium.
How many valence electrons are present in each one of them?