a) Write an equation to show the effect of heart on the nitrate of:

      

a) Write an equation to show the effect of heart on the nitrate of:
i) Potassium ii) Silver
b) The table below gives information about elements A1, A2, A3, and A4
i) In which period of the periodic table is element A2? Give reason
ii) Explain why the atomic radius of: I. A1 is greater than that of A2;
II. A4 is smaller than its ionic radius
19silver4102017936.jpg
iii) Select the element which is in the same group as A3

  

Answers


John
a) (i) 2KNO3(s) $\rightarrow$ 2KNO2(s) + O2g

ii) 2AgNO3(s) $\rightarrow$ 2Ag(s) + 2NO2(g) + O2(g)

b) i) Period 2. This is because it has two energy levels

ii) I. A2 has greater nucleus charge than A1 which has its electrons attracted strongly to
the nucleus

II. A4 gains electrons. Incoming electron is repelled by existing electrons making the ionic radius
larger .

iii) A2
johnmulu answered the question on April 10, 2017 at 10:22


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