(Solved): Honnework 5 Additional Problertie from Cotfon 1. There are three naturally occurringt instopes ef p ...

Honnework 5 Additional Problertie from Cotfon 1. There are three naturally occurringt instopes ef potassiumt. Finst, there is potasiiurn-39 with a 41 with a percent abundance of \( 6.7302 \% 6 \) and an atcimie mass of \( 40.961 \mathrm{k} 25 \) ai. The thir?l isntope is potassium-40, It is a naturally occurring radiodetive iscotope and it is whad makree biranas : and salf substitute radioactive, Altheugh its percent abuma ance is enly \( 0.6117 \) tis. there zh chough of present in foods to set off a defector. The mass othe atom of \( \mathrm{K} \) is \( 39.659093 \). What is the afomic weight of nafural potassium in atomic mats units? 2. Which of the following is ionic and which is covalent? Explain how you could tell. \( ( \) a) CaCla 3. Please give how many protons, neutrons and electrons are in each of the following ions: a. \( { }^{21} \mathrm{Na}^{+} \) b. wo \( Y^{3 \cdot} \) c. A compound has cobalt with a \( +2 \) charge. The cobalt isotope present is tadioactive and has a mass number of 60 . d. \( D^{+} \)(hint: see hydrogen) c. A halide ion with a mass number of 37 . (Sefecfed amswers: (a) If, I2, 10) 4. Give the chemical name and symbol for an two elements that are: a. An alkali metal b. A rare earth metal c. A halogen d. Chalcogen c. An alkaline earth metal f. A main group element g. A transition metal 5. Give the symbol and the chemical name for two elements that are a. a pnictogen b. a metalloid c. A main group metal d. A metal from column 14 e. A noble gas f. A main group nonmetal g. An anomalous element