Topic 1: Materials and their atoms-Review

There are two isotopes of Chlorine Cl (35) and Cl(37). What are the similarities and differences between the two isotopes? Label the following features of an element Element symbol Atomic number Element name Molar Mass Fill in the blanks in the table Symbol Charge Atomicnumber MassNumber numberofprotons numberofelectrons numberofneutrons Li 0 4 Mg2+ 24 12 -1 17 18 8 10 8 What relationships do the groups and periods have with the electronic configuration of an element? Write the electronic configuration and the main shell electronic configuration of the following elements put a dot between each sub shell as you won't be able to do the number above (e.g. 1s2.2s2.2p6) Element Electronic configuration Main shell electronicconfiguration Na+ P Fe F Match the main group numbers with their names Group 1 Alkali Metals Group 2 Alkaline Earth metals Group 7 Halogen Group 8 Noble gasses Explain the trends in electronegativity within the periodic table? Explain the trends in atomic radius throughout the periodic table Calculate the number of atoms in 9.4 moles of hydrogen gas (H2) Calculate the mass of 9.4 moles of hydrogen gas (H2) If you have 7 moles of iron sulphate Fe2(SO4)3how many moles of Fe3+ ions are present? If you have 7 moles of iron sulphate Fe2(SO4)3how many moles of Oxygen atoms are present? Examine the spectra below and determine which elements are present in the mixture. Calculate the moles of NaHCO3in 6.72g Calculate the molar mass of Fe2S3 Calculate the molar mass of NaClO Calculate the molar mass of Pb(NO3)2 Calculate the molar mass of FeSO4.6H2O Match the following terms A mixture of two or more metals Alloy Physical property a property which can be measured without changing the material Chemical property a property which can only be measured during or after a chemical reaction has taken place compound contains more than one type of element mixture made up of more than one type of molecule molecule contains more than one atom