21 Questions about the periodic table

This element is named as the country where Marie Curie was born.

• Polonium

• Silicon

• Francium

• Hydrogen

Is the second rarest element in nature

• Gallium

• Silicon

• Francium

• Hydrogen

If it’s summer we can find this element in liquid state. But, if it’s winter we will find it in solid state.

• Gallium

• Silicon

• Oxygen

• Hydrogen

Moon’s surface is mainly composed of this element:

• Potassium

• Silicon

• Oxygen

• Hydrogen

This element has a close connection with electronics.

• Potassium

• Silicon

• Boron

• Hydrogen

This element was generated because of cosmic rays

• Potassium

• Beryllium

• Boron

• Hydrogen

Light bulbs used to be made with this element

• Potassium

• Tungsten

• Titanium

• Hydrogen

It is the most abundant element of the universe

• Potassium

• Neodymium

• Titanium

• Hydrogen

When this elements reacts with water, explodes.

• Potassium

• Neodymium

• Titanium

• Mercury

It used to be the element with which spaceships were made

• Praseodymium

• Neodymium

• Titanium

• Mercury