List of practice Questions

What are the major differences between metals and non-metals?

Use the periodic table to answer the following questions.

1. Identify an element with five electrons in the outer subshell.
2. Identify an element that would tend to lose two electrons. 
3. Identify an element that would tend to gain two electrons.
4. Identify the group having metal, non-metal, liquid as well as gas at the room temperature.

The increasing order of reactivity among group 1 elements is \(Li\) \(<Na\) \(<K\) \(<Rb\) \(<Cs\) 
whereas that among group 17 elements is \(F>Cl>Br>I\) Explain.

Predict the formula of the stable binary compounds that would be formed by the combination of the following pairs of elements.

1. Lithium and oxygen 
2. Magnesium and nitrogen 
3. Aluminium and iodine 
4. Silicon and oxygen
5. Phosphorus and fluorine 
6. Element 71 and fluorine

Considering the elements B, Al, Mg, and K, the correct order of their metallic character is:

Considering the elements B, C, N, F, and Si, the correct order of their non-metallic character is:

Considering the elements F, Cl, O and N, the correct order of their chemical reactivity in terms of oxidizing property is:

On the basis of quantum numbers, justify that the sixth period of the periodic table should have 32 elements.

Which element do you think would have been named by
(i) Lawrence Berkeley Laboratory
(ii) Seaborg's group?

Why do elements in the same group have similar physical and chemical properties?

What does atomic radius and ionic radius really mean to you?

How does atomic radius vary in a period and in a group? How do you explain the variation?

Explain why cations are smaller and anions larger in radii than their parent atoms?

Describe the theory associated with the radius of an atom as it 

1. gains an electron 
2. loses an electro

Would you expect the first ionization enthalpies for two isotopes of the same element to be the same or different? Justify your answer.