Question

Indicate whether each of the following statements are true or false
1. Arsenic is a metalloid.
2. The hydroxide of aluminium is amphotheric
3. PbCl4 is more prevalent than PbCl2
4. Al has a diagonal relationship with C
5. For an element to convert into an anion, it’s ionization energy must be high and the electron affinity must be negative

Answer 1

1. True. Arsenic has intermediate properties between metal and nonmetal.
2. True. Aluminium hydroxide can have acidic and basic properties.
3. False. Pb²⁺ cation is more stable than Pb⁴⁺.
4. False. Al has diagonal relationship with Be, while C has diagonal relationship with P.
5. True. However, the ionization energy itself is considered when forming cations rather than anions. The lower the ionization energy, the easier the element is converted to a cation.The electron affinity should be negative to convert to the anion because the energy is released in this process.