6. On the periodic table, where are the least electronegative atoms located? Are they metals, nonmetals, or metalloids?
7. Why do you think the Noble Gases do not have electronegativity values ?
8. For each of the following pairs of atoms, highlight the atom that will attract shared electrons more
strongly
a. Carbon or
Chlorine
b. Rubidium
or Bromine
C. lodine
1
or Indium

answer carbon and three oxygen atoms;

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.