Lets us Explore Classification of elements

What happens to the electropositive character of elements on moving from left to right in a periodic table?

• Increases

• Decreases

• First increases than decreases

• First decreases than increases

The electronic configuration of an element M is 2, 8, 4. In modern periodic table, the element M is placed in

• 4 group

• 2 group

• 14 group

• 18 group

Which of the following is the correct order of the atomic radii of the elements oxygen, fluorine and nitrogen?

• O < F < N

• N < F < O

• O < N < F

• F < O < N

What is the other name for group 18^th elements?

• Noble gases

• Alkali metals

• Alkaline Earth metals

• Halogens

Which of the following is the most reactive element of the group 17?

• Oxygen

• Fluorine

• Magnesium

• Nitrogen

Which of the following elements has 2 shells and both are completely filled?

• Helium

• Neon

• Calcium

• Boron

Which of the following is the atomic number of an element that forms basic oxide?

• 18

• 17

• 19

• 15

. Which of the following does not decrease while moving down the group of the periodic table?

• Atomic radius

• Metallic character

• Number of shell in an atom

• Valence electrons

An element M is in group 13^th of the periodic table, the formula for its oxide is

• MO

• M₂O₃

• M₃O₂

• None

Who has given the Modern Periodic table?

• Mendeleev

• Neils Bohr

• Newlands

• Moseley