Activity 7. Electronic Configuration Use this table as guide for activity 7
Table 3. Arrangement of electrons in the atoms of the first 10 elements
A
Chemical
2.
2p
Electron Configuration
2px
1
11
11
1
1
11
1242
1s 2s 2px 2px
1s 2s 2p 2px 2p!
1s 2s 2px 2px 2pa!
1s 2s22px 2px 2p
1s 2s22px 2px 2p
11
30 No
1

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.