within the Periodic Table
Trends within the periodic
table help chemists predict reactions.
Trends within the
periodic table help chemists predict reactions. Use your knowledge of those
trends to answer the following questions.
Explain how an element’s group in the periodic
table can be used to predict its outer shell electrons. Elements in the same group have similar chemical properties
because the atoms of these elements have the same number of electrons in there outer
shell for example Lithium, sodium and potassium are all in
group 1 so therefore have one electron in there outer shell. (3
Each element in the periodic table has a specific
proton (atomic) number. Research an element which has at least two isotopes and
provide the number of protons, neutrons and electrons for each isotope. (You
may not choose carbon).
Neutrons: 1 (3
Metals are not usually found in their pure elemental
form. Explain why (one mark) and give an example of a metallic ore mined in
Australia (one mark). Provide one use for that metal. (1 mark)
Metals are not usually found in their pure elemental form because
most metals occur in nature as compounds chemically combined with other elements.
A metallic ore mined in Australia is Iron. Iron is used mostly to make steel which
can then be used as pots and pans.
Provide three properties of the metal you chose in
question 3. Explain two of those properties in terms of the metallic bonding
Three properties of iron are:
Conduct heat: Solid and liquid metals
conduct heat. The delocalised electrons are free to move around in the
solid lattice. These mobile electrons act as charge carriers in the
conduction of electricity or as energy conductors in the conduction of heat.
delocalised electrons in the ‘sea’ of electrons in the metallic bond, enable
the metal atoms to roll over each other when a stress is applied.
Provide the electron configuration for iron.
Ar 3d6 4s2 (1 mark)
Predict what would occur if a period three, group 1
element came in contact with a period 2, group 17 element. Explain your
prediction in terms of electron donation and acceptance. (2 marks)
A sodium atom has one electron in the outer shell.
A fluorine atom seven electrons in the outer shell.
A sodium atom loses an electron to a chlorine atom.
The sodium atom becomes a positive sodium ion.
The fluorine atom becomes a negative flurine ion.
Both sodium ions and fluorine ions have full electron shells.
The sodium ions and fluorine ions form an ionic lattice..
Name the type of bonding which occurs as a result of
the reaction in question 6 above. (1
Neon gas is used in neon signs. Explain why it gives
off red light when heated by electrical current (2
Include a full bibliography and use footnotes for
diagrams and quotations if applicable. (2
TOTAL 20 marks C: Louise/2017/February/trends within
the periodic table.doc