1. Wrich of the fobowing staterfents about isctopos is not true? a) - isotopes of the same element have the same number of protons b) lisolopes of the same element have the same number of eloctrons. c) Isotopes of the same tiement exhibit the same physical propertios d) Isotopes of the same element exhibit the same chemical properties 2. Which type of checrical bond is present in molecules such as MgO and NaH2 ? a) Hydrogen bond b) Covalent bond c) Polar covalent bond d) lonic bond 3. A carthon atom can become stable only by a) Losing four valence electrons to form icnic bonds and acquie a stable duplet b) Gaining four electrons to form ionic bonds and scequirn a stable octat. c) Sharing four eiectrons with atoms of other elements d) Losing four electrons to any free radical 4. in the reaction. N2+3H2 a 22NH3. the total number of bonds in the preduct is a) equal to the number of bonds in the reactants b) one less than the number of bonds in the reactants. c) one groater than the numbor of bonds in the reactants d) two less than the numbor of bonds in the reactants 5. Within the periodic table, the tendency of the elements to gain electrons a) Decreases from left to right in al period b) increases from left to right in a period c) Decreases from lop to botlom in all groups d) Increases from top to bottom in all groups 6. When moving down a group of the periodic table, the ionization onergy of each successive element normally a) Increases c) remains the same b) Decreases: d) increases and then decreases: Short Answers 7. Draw Lewis structures and structural formulas for the following compounds: a) NH3 b) H2CO c) HCN a) Ahrwoni un frander te) Caiflum cartorate e) Phansium eyisnide. an Zn+cuphn b) BabNong + N NH4= c) NO= 10. 4 po the folicwing information so aniwer tire next qutstron. The gutan table atiminaricoit the roavt of the exporivent. Based on the results of the experimen, rark the metals X. Y. and Z in an activity seriesinost reactive to least). 11. Pure iran can be produced by a teaction betweon ironili) oxide and aluminum. a) Write a balanced chemical equation for tris reaction. b) What type of reaction is this