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1 markStates of Matter

CSEC Chemistry · January 2021 · Paper 2 · Question 4(c)(ii)

Observations in a Home Economics class: Observation 1: Cucumber slices release water when salt is added. Observation 2: Peas swell when soaked in water.

State ONE other example that demonstrates this process.

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  1. 4(a)(i)Complete Table 3 showing the three subatomic particles and their relative masses and charges.[4 marks]
  2. 4(a)(ii)Consider the notation of an atom of an unknown element, ²⁹₁₄A. Draw a labelled diagram to illustrate the location, arrangement and number of EACH type of…[5 marks]
  3. 4(b)Calculate the number of atoms in 80.0 g of calcium. [Relative atomic mass of Ca = 40; Avogadro's constant = 6.0 × 10²³][2 marks]
  4. 4(c)(i)Explain the chemical process that can account for these observations.[3 marks]

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