MEDIUM
10th Mizoram Board
IMPORTANT
Earn 100

What were the limitations of Newlands’ Law of Octaves?

Important Questions on Periodic Classification of Elements

EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>QUESTIONS>Q 1
Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements:
K, C, Al, Si, and Ba.
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>QUESTIONS>Q 2
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>QUESTIONS>Q 3
What were the criteria used by Mendeleev in creating his Periodic Table?
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>QUESTIONS>Q 4
Why do you think the noble gases are placed in a separate group?
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>QUESTIONS>Q 1
How could the Modern Periodic Table remove various anomalies of Mendeleev’s Periodic Table?
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>QUESTIONS>Q 2
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>QUESTIONS>Q 3
Name(in increasing atomic mass):
(a) Three elements that have a single electron in their outermost shells.
(b) Two elements that have two electrons in their outermost shells.
(c) Three elements with filled outermost shells.
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>QUESTIONS>Q 4
Lithium, sodium and potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?