\n<\/p>\n

<\/p>\n<\/p>\n

Elements in the Periodic Table are organised in rows
\ncalled \u201eperiods\u201f. <\/p>\n

This is because there are regular repeating patterns in
\nphysical and chemical properties. <\/p>\n

The repeating patterns in properties of elements are due
\nto repeating patterns in their electron configurations. In this activity we
\nlook at trends in some of the properties of the elements and how these
\nproperties change as we move down and across the periodic table. <\/p>\n

Graphs are a useful way of showing trends. In this
\ninvestigation we will graph melting points, atomic radius and ionisation energy
\nof the first 36 elements (the first 3 periods), and look for trends and
\npatterns. <\/p>\n

Use the data provided to construct graphs in the
\nfollowing activity. <\/p>\n

Data:<\/b><\/p>\n

<\/p>\n

Plot trends in
\nmelting point: <\/b><\/p>\n

Graph atomic
\nnumber against melting point.<\/u><\/b><\/p>\n

<\/b><\/p>\n

1.\u00a0
\n<\/b>What trends in melting point do you observe:<\/p>\n

a)\u00a0 Going
\nacross a period?<\/p>\n

b)\u00a0 Going
\ndown a group?<\/p>\n

Plot trends in
\natomic radius:<\/b><\/p>\n

Graph atomic
\nnumber against atomic radius.<\/u><\/b><\/p>\n

<\/b><\/p>\n

2.\u00a0
\n<\/b>\u00a0<\/p>\n

a)\u00a0 What
\ntrend do you observe across a period?<\/p>\n

b)\u00a0 What
\ntrend do you observe at the start of a period?<\/p>\n

c)\u00a0 Explain
\nwhy the trend in atomic radius moving across a period is different from the
\ntrend moving down a group.<\/p>\n

Plot trends in\u00a0ionization\u00a0energy:<\/b><\/p>\n

Graph atomic
\nnumber against ionization energy.<\/u><\/b><\/p>\n

<\/b><\/p>\n

3. <\/b><\/p>\n

a) What trend do you observe across a period? <\/p>\n

b) What trend do you observe at the start of a period? <\/p>\n

4.<\/b><\/p>\n

\u00a0a) Complete
\nelectron shell configuration of Barium below: <\/p>\n

\u00a0Barium: 2, 8,
\n\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. How many electrons are in the outer shell? <\/p>\n

b) The first three ionization energies of Barium are
\nshown below: <\/p>\n

To remove the outermost electron 1st ionization energy:
\n502.9 kJ mol-1 <\/p>\n

To remove the next outermost electron 2nd ionization
\nenergy: 965.2 kJ mol-1 <\/p>\n

To remove the next outermost electron 3rd ionization
\nenergy: 3600 kJ mol-1<\/p>\n

Explain why the second ionization energy of Barium is relatively
\nsmall and the third ionization energy is much larger than the first or the
\nsecond:<\/p>\n

5.<\/b> As we move from left to right across a period,
\nelectrons are added one at a time. Explain how this affects the trend in
\nionization energy shown in your graph:<\/p>\n<\/p>\n

<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Elements in the Periodic Table are organised in rows called \u201eperiods\u201f. This is because there are regular repeating patterns in physical and chemical properties. The repeating patterns in properties of elements are due to repeating patterns in their electron configurations. In this activity we look at trends in some of the properties of the elements […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_joinchat":[]},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/qualityassignments.net\/wp-json\/wp\/v2\/posts\/175540"}],"collection":[{"href":"https:\/\/qualityassignments.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qualityassignments.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qualityassignments.net\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/qualityassignments.net\/wp-json\/wp\/v2\/comments?post=175540"}],"version-history":[{"count":0,"href":"https:\/\/qualityassignments.net\/wp-json\/wp\/v2\/posts\/175540\/revisions"}],"wp:attachment":[{"href":"https:\/\/qualityassignments.net\/wp-json\/wp\/v2\/media?parent=175540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qualityassignments.net\/wp-json\/wp\/v2\/categories?post=175540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qualityassignments.net\/wp-json\/wp\/v2\/tags?post=175540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}