1. In chemistry, what is the name of the chart listing all the elements and which was devised by a Russian named Mendeleev.

2. Of the three state of matter, solid, liquid and gas, which state does water vapour belong to?

3. When a substance goes from being in a solid state straight to being a gas, what is the name of this chemical process?

4. Along with protons, what else is found in the nucleus of an atom?

5. Magnets can attract and repel depending on the position of the magnetic poles. What poles repel and which ones attract?

6. Which metal has the highest melting point and is used as the filament in incandescent light bulbs.

7. What type of metals can explode if they are exposed to water?

8. Ammonia is composed of one nitrogen atom and three atoms of which element?

9. As a result of high heat and pressure inside Earth which element turns into diamond?

10. Which radioactive element was commonly used added in the paint for painting Roman numerals on old clock faces?

Answers

1. Periodic table

2. Gaseous

3. Sublimation

4. Neutron

5. Similar poles repel and opposite poles attract.

6. Tungsten

7. Alkali metals

8. Hydrogen

9. Carbon

10. Radium