Elements on the Periodic Table are arranged according to increasing  Blank 1 Question 8 number.atomic electron neutron massQuestion 9Not yet answeredMarked out of 3Flag questionQuestion textPotassium is a mineral and an electrolyte. It helps your muscles work, including the muscles that makes your heart beat. Potassium comes from the food like bananas.Give the chemical symbol used for the element potassium. Blank 1 Question 9Give the name of the group in which potassium can be found. Blank 2 Question 9In which period on the Periodic Table can potassium be found? Blank 3 Question 9

3.(a) The table below shows the atomic numbers of elements of the periodic table representedby letter J toQ.The letters are not the actual chemical symbols for the elementsElement J K L M N P O QAtomicnumber3 7 8 9 10 12 13 1410(i) Select two elements which belongto:I The same period of theperiodictable (1 mark)..............................................................................................................................................................................................................................................................II The same group of the periodictable.............................................................................................................................................................................................................................................................(ii) Select theelementwhich (1 mark)I Will form a divalentunion....................................................................................................................................................................................................................................................................II Reacts most vigorously withwater.....................................................................................................................................................................................................................................................................(b) The boiling points of some chloride are shown in the tablebelow:Group I II III IV V VI VIIChloride LiCl Chlorideof WBCl 3 CCl 4 NCl 3 OCl 2 FClB.P. ( 0 C) 1350 487 12 77 71 2 -101Chloride Nacl Mgcl 2 AlCl 3 Chlorideof XPCL 3 SCl 2 Cl 2B.P. ( 0 C) 1465 1418 Sublimesat 18057 74 59 -35(i) What is the most likely formulae for the chlorides of W andX?...................................................................................................................................................................................................................................................................(ii) Select two chlorides from the table which are the most ionic. Explain why the twoelected chloride are the mostionic.......................................................................................................................................................................................................................................................................(iii) Would you expect group VIII elements of the periodic table to form chlorides?Explaintheanswer (1mark)

Which element is a metalloid located in period 4, group 14 of the periodic table?

Lithium, sodium and potassium are all in the same group (group 1) of the periodic table, because they __________ in a similar way. What word completes the sentence?

44. You were given three unknown substances  illustrated below. How can you classify them?1 pointThey are different atoms.They are all the same atoms.They are isotopes of the same atom.They are isotopes of different atoms.Clear selection45. The electron configuration of an atom is 1s2 2s2 2p6 3s2 3p6 4s2. How is this atom classified in the periodic table?1 pointAlkali metalsAlkaline earth metalsBoron groupHalogens group46. Aluminum belongs to Group III A ( Boron Group) and Period 3 in the Periodic table. Which is the correct electron configuration of aluminum?1 point1s2 2s2 2p6 3s21s2 2s2 2p6 3s2 3p11s2 2s2 2p41s2 2s2 2p6 3s147. Which of the following atoms is the most reactive?1 pointLiNaBeMg48. What happens to the size of the atom as you go down the group?1 pointDecreasesIncreasesReduced to halfRemains the same49. Why are helium gases used in party balloons and meteorological balloons than hydrogen gases?1 pointIts non-toxic.It is lighter than air.It diffuses faster in the air.It does not readily react to other substances.50. Computer hard disks, thermocouples, optical fibers, liquid crystal displays (LCD), spark plugs, pacemakers and dental fillings requires a metal that is non-reactive in order for products to be corrosive resistant even at higher temperatures. Considering the reactivity series, which among the following will you use in creating the given equipment/ materials?1 pointAluminumCopperPlatinumSilve

Complete the table by selecting the, relative charge and position in the atom for each subatomic particle.particle         relative charge      position in atom    proton Blank 1 Question 7 Blank 2 Question 7electron Blank 3 Question 7 Blank 4 Question 7neutron  Blank 5 Question 7  Blank 6 Question 7Question 8Not yet answeredMarked out of 9Flag questionQuestion textThe following picture shows the symbol for calcium, as it can be seen on the Periodic Table. Use the information on the picture to answer the questions.Give the name of the element. Answer 1 Question 8What information does the top number give you about this element? Answer 2 Question 8What information does the bottom number give you about this element? Answer 3 Question 8How many nucleons do atoms of this element have? Answer 4 Question 8How many protons do atoms of this element have? Answer 5 Question 8How many neutrons do atoms of this element have? Answer 6 Question 8How many electrons do atoms of this element have? Answer 7 Question 8Which particles do not contribute to the mass of an atom? Answer 8 Question 8Where are you going to find the electrons in these atoms? Answer 9 Question 8Question 9Not yet answeredMarked out of 4Flag questionQuestion textIdentify the correct sub-atomic particle(s).a) Sub-atomic particle with a positive charge.Multiple choice 1 Question 9protonselectronsneutronsb) Sub-atomic particle responsible for the volume of the atom.Multiple choice 2 Question 9protonselectronsneutronsc) Sub-atomic particles responsible for the mass of the atom.neutronselectronsprotonsQuestion 10Not yet answeredMarked out of 8Flag questionQuestion textThe following diagram shows the Bohr model of an atom. Use the diagram to answer the questions that follow.How many electrons does the atom have? Answer 1 Question 10How many protons does the atom have? Answer 2 Question 10How many neutrons does the atom have? Answer 3 Question 10Is that atom neutral? Answer 4 Question 10What will be the atomic number of the element? Answer 5 Question 10What will be the atomic mass of the element? Answer 6 Question 10How many valence electrons does the atom have? Answer 7 Question 10Give the symbol for the element. Answer 8 Question 10 (Use your Periodic Table)