How do physical properties of nonmetals differ from the physical properties of metals?

The inter or intramolecular bonding forces affect the physical properties of the metals and nonmetals.

The bonding forces of the element in the periodic table get varied within the periods and groups. In the groups, more shells increase the shielding effects and in the periods, the repulsion among the electrons increases. These factors affect the behaviour of an atom during the process of making bonding or reactions. These are the reasons which make the most of the metals in the solid form and nonmetals in the liquid or gas forms.  

answer; /// i believe that the correct answer is (c)

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.