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Chemistry Project: About the Periodic Table By Hajra Ghani 9C - Coggle…
Chemistry Project:
About the Periodic Table
By Hajra Ghani 9C
General Trends in Periods
• The atomic size of elements decreases as you go from left to right in a period of the periodic table.
• The metallic properties of elements decrease as you go from left to right in a period of the periodic table.
• The shell number of elements stays the same as you go from left to right in a period of the periodic table.
General Trends in Groups
• The atomic size of elements increases as you go from top to bottom in a group of the periodic table.
• The density of elements increases as you go from top to bottom in a group of the periodic table.
• The shell number of elements increases one by one as you go from top to bottom in a group of the periodic table.
• The number of valence electrons of elements stays the same as you go from top to bottom in a group of the periodic table.
Trends in Group 1 (Alkali Metals)
• The melting and boiling point of elements decreases as you go from top to bottom in group 1 of the periodic table.
• The reactivity of elements increases as you go from top to bottom in group 1 of the periodic table.
• The density of elements increases as you go from top to bottom in group 1 of the periodic table.
• The softness of elements increases as you go from top to bottom in group 1 of the periodic table.
• The soft solid state of elements stays the same in group 1 of the periodic table.
• The reaction of elements with air and water increases decreases as you go from top to bottom in group 1 of the periodic table.
Trends in Group 7 (Halogens)
• The melting and boiling point of elements increases as you go from top to bottom in group 7 of the periodic table.
• The reactivity of elements decreases as you go from top to bottom in group 7 of the periodic table.
• The density of elements increases as you go from top to bottom in group 7 of the periodic table.
• The state of elements changes from gas to liquid to solid as you go from top to bottom in group 7 of the periodic table.
• The intensity of the colour of elements increases as you go from top to bottom in group 7 of the periodic table.
• The reaction of elements with metals decreases as you go from top to bottom in group 7 of the periodic table.
Trends in Group 8 (Noble Gases)
• The melting and boiling point of elements increases as you go from top to bottom in group 8 of the periodic table.
• The reactivity of elements stays the same as you go from top to bottom in group 8 of the periodic table since all the elements of group 8 are non-reactive.
• The density of elements increases as you go from top to bottom in group 8 of the periodic table.
• The gas state of elements stays the same as you go from top to bottom in group 8 of the periodic table.
• The number of valence electrons of elements stays the same as you go from top to bottom in group 8 of the periodic table.
• The stability of elements stays the same as you go from top to bottom in group 8 of the periodic table since all the elements of group 8 are stable.
Transition Metals Properties
• They are hard and strong.
• They have a high density.
• They have high melting and boiling points.
• Many of their compounds are coloured.
• They often show more than one valency so they form more than one type of ion.
• They are among the most useful metallic elements available to us.