Why do elements in the group show the same valency?

Important Questions on Periodic Classification of Elements

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 2

Two elements $\mathrm{X}$ and $\mathrm{Y}$ belong to same period. What is common in them? 

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 3

Why does metallic character increase on moving down the group?

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 4

Why does metallic character decrease on moving left and right in a period?

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 5

Which is more metallic K or Cs?

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 6

An atom has electronic configuration $2,8,6$. What is the atomic number and name of this element?

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 7

Where would you locate the element with electronic configuration $2,8,18,3$ in the modern periodic table?

MEDIUM

10th ICSE

IMPORTANT

Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 8

Where would you locate the element with atomic number $38$ in periodic table?

HARD

10th ICSE

IMPORTANT

Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 9

Which element has twice as many electrons in its second shell as in its first shell?