Elements in the Modern Periodic table are arranged in order of___

• Decreasing atomic number

• Decreasing atomic mass

• Increasing atomic number

• Increasing atomic mass

Modern periodic law had been given by ____

• Moseley

• Mendeleev

• Lavoisier

• Lother-Mayer

How many periods and groups are present in the periodic table?

• 7 periods and 18 groups

• 8 periods and 7 groups

• 7 periods and 7 groups

• 8 periods and 8 groups

The elements in group zero are called___

• Alkali metals

• Transition metals

• Inert gases

• Alkali Earth metals

In periodic table elements with same number of shells/orbits are placed in___

• Different groups

• same groups

• same periods

• different periods

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

• Helium

• Neon

• Calcium

• Boron

Transition metals are found between group number___

• 1 to 2

• 13 to 18

• 3 to 12

• 1 to 8

An element X belongs to the 3rd period and 1st group of the periodic table. What is the number of valence electrons in its atom?

• 1

• 3

• 6

• 8

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

• MO

• M2O3

• M3O2

• MO2

What is the other name for group 17 elements?

• Noble gases

• Alkali metals

• Alkali earth metals

• Halogens