Why bismuth has high boiling point?
The boiling point of bismuth is lower than antimony because it tend to form three covalent bonds instead of five due to inert pair effect. Consequently, the attraction between the atoms of bismuth is weak, leading to lowered boiling point.
Why antimony has highest boiling point?
The elements included in group number 15 are nitrogen, phosphorus, arsenic, antimony and bismuth. While moving down the group the atomic size of the element increases because an extra shell is added as the number of periods increases. So the boiling point of Sb is greater than Bi.
Why does arsenic have a high melting point?
Figure 1. *Note: The boiling point is actually lower than the melting point because arsenic change phases directly from a solid to a gas under normal atmospheric pressure. It requires pressures of 28 atm in order to phase change from a solid to a liquid, hence the higher temperature.
Why do melting and boiling points decrease down Group 1?
Both the melting and boiling points decrease down the group. The decrease in melting and boiling points reflects the decrease in the strength of each metallic bond. The atoms in a metal are held together by the attraction of the nuclei to electrons which are delocalized over the whole metal mass.
Why does boron have a higher melting point than Aluminium?
(ii) Aluminium is a good reducing agent. (i) Due to small atomic size boron forms strong covalent bonds with the neighbouring atoms. Thus boron atoms are closely packed in its solid, thus boron has high melting and boiling points.
What is lowest melting point?
The chemical element with the lowest melting point is Helium and the element with the highest melting point is Carbon. The unity used for the melting point is Celsius (C).
Why is CuCl4 yellow?
Solution of copper II ions (Cu2-) in copper sulphate (far left). When concentrated hydrochloric acid (HCl) is added, tetrachlorocuprate II complex ions ((CuCl4)2-) are formed. These ions are yellow in colour, which with the blue colour of copper ions results in a vivid green coloured solution (centre left).
Is cucl4 2 green?
Copper(II) chloride is the chemical compound with the chemical formula CuCl2. This is a green blue solid, which slowly absorbs moisture to form a blue-green dihydrate.
How do ligands affect Colour?
Different ligands have different effects on the energies of the d orbitals of the central ion. The greater the splitting, the more energy is needed to promote an electron from the lower group of orbitals to the higher ones. In terms of the colour of the light absorbed, greater energy corresponds to shorter wavelengths.