Five atoms are labelled from A to E

Predict which are :
(i) metals ?
(ii) non-metals?

Five atoms are labelled from A to E Which one of these atoms : (i) contains 7 protons ? (ii) has an electronic configuration 2, 7 ?

Five atoms are labelled from A to E Write down the formula of the compound formed between C and D.

Elements A, B and C have atomic numbers 9, 10 and 20 respectively. State which one is (i) a metal (ii) non-metal (iii) chemically inert. Explain the formation of bond between any two elements. Draw its orbital diagram. Name the type of bond.

The position of elements A,B,C,D and E in the periodic table are shown below : State which is the most reactive (i) metal (ii) non metal .

State the nature of compounds formed when group 17 elements combine with (i) metals (ii) non-metals.

The elements of the third period of the Periodic Table are given below: (a) Which atom is bigger, Na or Mg? Why? (b) Identify the most (i) metallic and (ii) non-metallic element in Period 3. (c ) Which is more non-metallic, S or Cl? (d) Which has higher atomic mass, Al or Cl?

Give two examples for each of the following : ( a) Non-metals which are solids (b) Metals which are soft (c) Non-metals which are lustrous ( d) Elements which are liquids ( e) Inert gases

Elements A, B and C have atomic numbers 9, 20 and 10 respectively. State which one is : (i) a non-metal (ii) a metal (iii) chemically inert.

Properties of the alkaline earth metals that increase from Be to Ba include which of the following? (i) Atomic radius (ii) Ionization energy (iii) Nuclear charge

An element with atomic number 5 belongs to III A group of the modern periodic table. Find Metal or non-metal or metalloid