Part B: Thinking and Inquiry

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True or False – State whether each of the following statements is true or false. Replace the underlined words with the proper correction in the blank space provided, if the statement is false. (5 marks) the following statement will be something like these

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T or F Statement Correction
The alkali metals are found in family I.
The molecule H2O contains six different atoms.

  1. Provide the formula, if the name is given, or the name if the formula is given. (10 marks)
Name Formula Formula Name
Potassium fluoride Mg3P2
Nickel oxide Ca3N2
Silver arsenide AgAt
Vanadium astatide PbTe4
magnesium chloride Li2Se
  1. Draw the Electron Dot Diagram for the following atoms. (3 marks)
Si

Sb

Po
  1. Indicate the charge on the following atoms if there were in their Ionic Form (3 marks)
Pt Bi R
  1. Fill in the following table: (9 marks)
Element Symbol
Element Name # of electrons # of protons Atomic number Atomic Mass # of neutrons
32 S
16
84 Kr
36
70 Ga
31
READ:
Representative sample: Definition

  1. In each table, indicate the name of the atom and the number of atoms total. (7 marks)
3 Sr3(PO4)2 NH4NO3
Name of Atom # of Atoms Name of Atom # of Atoms
Total Total
  1. Read the following statements and indicate if a physical (P) or chemical (C) change is taking place. (10 marks)
Observation Physical (P) or Chemical (C) Change Evidence?
A piece of paper is soaked in water and savagely torn in half.
A piece of paper is set on fire and blown away.
Carbon dioxide is blown into limewater and the water turned cloudy.
  1. Draw the Bohr-Rutherford diagrams for the following: (6 marks)

(a)                                                         (b)                                                         (c)

7 Li 12 C 20 Ne
3 6

Draw the category of classification of matter flow diagram. Include all parts labeled. (7 marks)

An unknown metallic cylinder displaces 301.73 cm3 of water. The mass of the sphere is 5874.21 grams. Determine whether the cylinder is aluminum (density = 2.7 g/mL), gold (density = 19.3 g/mL), or silver (density = 10.5 g/mL). Please show all of your work. (5 marks)
Draw the anatomy of an atom. Label all components, state their charges and whether that particle can leave the atom. (8 marks)

Part C: Application

Explain why the alkali metals are the most reactive. Use diagrams to aid your explanation (3 marks)

Suggest four clues you would consider before deciding whether a change is physical or chemical (4 marks)

A friend tells you that water boiling in a kettle is an example of a physical change, but that an anti-acid bubbling in water is not a physical change. Do you agree, why? (2 marks)

READ:
Valence shell electron pair repulsion (VSEPR) theory

A friend tells you that melting ice with a magnifying glass an example of a physical change, but that a strip of magnesium bubbling in water is not a physical change. Do you agree, why? (2 marks)

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