Table of Contents
- 1 Why does the boiling point of Group 15 elements increase down the group?
- 2 Which element has highest melting point in Group 15?
- 3 Why does melting point increases up to arsenic and then decreases upto bismuth?
- 4 Why do melting and boiling points increase down the group 16?
- 5 Why does melting point increases till arsenic and then decreases?
- 6 Why melting point increases upto arsenic and decreases upto bismuth?
- 7 Why does the melting point of nitrogen increase down the group?
Why does the boiling point of Group 15 elements increase down the group?
Atomic radii increase in size down the group. Melting point (amount of energy required to break bonds to change a solid phase substance to a liquid phase substance) increases down the group. Boiling point (amount of energy required to break bonds to change a liquid phase substance to a gas) increases down the group.
Why melting point decreases down the group?
Generally the melting point of the alkali metals decreases down the group. This is because as the ions get larger the distance between the bonding electrons and the positive nucleus gets larger and reduces the overall attraction between the two.
Which element has highest melting point in Group 15?
Periodic Trends in Group 15 Elements
| Property | Nitrogen | Antimony |
|---|---|---|
| Melting point Boiling point (°C) | – 210 -196 | 631 1587 |
| Density (g/cm3) at 25°C | 1.15(g/L) | 6.68 |
| Atomic radius (pm) | 56 | 133 |
| First Ionization energy (kJ/mol) | 1402 | 834 |
Why melting point increases till arsenic and then decreases?
The melting point increases upto arsenic and then decreases upto bismuth due to the presence of completely filled d and/or f orbitals.
Why does melting point increases up to arsenic and then decreases upto bismuth?
Melting point from nitrogen to arsenic increases & from arsenic it decreases upto bismuth because down the group as the size of the element increases the tendency of elements to form three covalent bonds increases (inert pair effect).
Why does melting and boiling point increase down group 15?
Boiling points of the elements increases down the group mainly because the mass increases. Melting point on the other hand depends on the energy required to overcome the inter-molecular interactions and break the vanderwall forces between the molecules.
Why do melting and boiling points increase down the group 16?
The melting and boiling point increase down the group due to the increase size of the element, which increases the Van der Waal’s forces of attraction and hence the melting and boiling point increases down the group.
Why does melting point increase to arsenic?
The loosely held electrons give rise to weak interactions. Arsenic as you know is a metalloid, so it is the point of inversion of the strength of interactions. Hence, melting point increases upto Arsenic and decreases down till Bismuth.
Why does melting point increases till arsenic and then decreases?
Why does melting point decrease down group 15?
As we go down the group the atomic size increase so vanderwall’s force of attraction increases. Thus melting point of group 15 increases down the group but its melting point decreasing at Sb and Bidue to the inert pair of effect . Instead of forming 5 covalent bonds they form only 3 covalent bond .
Why melting point increases upto arsenic and decreases upto bismuth?
Why melting point increases upto arsenic … Melting point from nitrogen to arsenic increases & from arsenic it decreases upto bismuth because down the group as the size of the element increases the tendency of elements to form three covalent bonds increases
Why does the boiling point increase down the group 15 elements?
Due to the same reason, the boiling point of group 15 elements increases down the group. The melting point in a group increases with the increase in nuclear charge. In group 15, the melting point increasing upto arsenic but decreases afterwards due to inert pair effect.
Why does the melting point of nitrogen increase down the group?
Melting point from nitrogen to arsenic increases & from arsenic it decreases upto bismuth because down the group as the size of the element increases the tendency of elements to form three covalent bonds increases (inert pair effect).Thus, there are weak forces of attraction between their atoms in solid state leading to lowering in melting point.
Why does the melting point of Group 15 increase with charge?
EXPERT ANSWER. The melting point in a group increases with the increase in nuclear charge. In group 15, the melting point increasing upto arsenic but decreases afterwards due to inert pair effect. Sb and Bi have a tendency to form three bonds instead of five due to which their melting points are less.