1.2 Show the atomic structure of the element aluminum with atomic number 13. What is its electron valence? 1.3 In observing the maximum number of electrons in shells K, L, M, and N in Fig. 1-3, you will find that they are 2, 8, 18, and 32 electrons, respectively. Develop a formula that describes this relationship, where n is the shell number in sequential order outward from the nucleus. 1.4 What is the net charge of a body that contains 8 protons and 4 electrons? 1.5 A charged insulator has deficiency of 50 x 101 electrons. Find its charge in coulombs with polarity. 1.6 Write the word which most correctly completes each of the following statements: (@) A rubber rod repels a second rubber rod, so both rods have charges. (b) Glass rubbed with silk attracts rubber rubbed with fur. If the rubber rod is negative, the glass rod must be_. 1.7 Find the current needed to charge a dielectric so that it will accumulate a charge of 20 C after 4 s. 1.8 A current of 8 A charges an insulator for 3 s. How much charge is accumulated