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WorksheetsChemistry Test 2022
Total questions: 28
Worksheet time: 7hrs 0mins
A chef was preparing chocolate icing for a loaf cake.
She weighed out 10 g of baking soda which has the formula Na2CO3 . She then
added icing sugar and water to which she slowly added milk while vigorously
stirring. She added cocoa to make it a consistent light brown and applied it
to the cake, continuously stirring the mixture. State whether the mixture applied to the cake was homogenous or heterogeneous and explain your choice.
Icing Sugar contains molecules of glucose, and has the formula C6H12O6 - State whether glucose is an element, compound or mixture
(a)
State how many oxygen atoms are in one molecule of glucose with the formula C6H12O6
(a)
Sodium carbonate is soluble, whereas calcium carbonate is not soluble in water. Both are white solids at room temperature. Assume 2g of sodium carbonate and 2g of calcium carbonate are mixed up. Describe a method that you could use to separate 2g of sodium carbonate from 2g of calcium carbonate.
The diagram below is not drawn to scale but shows the arrangement of subatomic particles in a particular atom. State the name of the positive subatomic particle.
(a)
State the name of the area in which this particle is found (from previous question).
(a)
State the atomic number of this atom.
(a)
State the mass number of this atom.
(a)
State the name of the atom.
(a)
State whether the above atom is metallic/non-metallic/metalloid
(a)
State the maximum number of electrons that the 1st shell can hold
(a)
Give the electron configuration of the ion this atom forms
(a)
Using your understanding of atomic structure complete the table below (draw on the image to fill in the blanks):
Use the Periodic table to complete the table below: (draw on the image to fill in the blanks):
Use the highlight tool to label Group IV on the Periodic table below
Use the highlight tool to label Period 5 on the Periodic table below
Use the highlight tool to label the boundary that separates the two main groups of elements on the Periodic table below
Use the highlighter tool to show the group that signifies that the outer most shell is completely full on the Periodic table below
Strontium has the Atomic Number of 38 and has 4 isotopes. Explain what is meant by the term ‘isotope’.
The metallic structure can be diagrammatically represented as a lattice structure shown below. Identify particle 1.
(a)
The metallic structure can be diagrammatically represented as a lattice structure shown below. Identify particle 2.
(a)
Describe how the metallic structure allows metals to conduct electricity in the solid state.
Ionic compounds form from electron transfer. Consider the element sodium. State the atomic number.
(a)
Draw the electron dot diagram for sodium.
Ionic compounds form from electron transfer. Consider the element chlorine. State the atomic number.
(a)
Draw the electron dot diagram for chlorine.
Draw the electron dot diagram to demonstrate the electron transfer from a sodium atom
to a chlorine atom AND write the formula for the ionic compound formed.
Describe why sodium chloride has a high melting and boiling point.
