What happens to the boiling points of group 7 elements as you go down the group?

Answer 1

First you need to understand bonding in metals. Each metal atom loses its outer electrons, which are then free to move between the lattice of positively charged metal ions in the solid. The metal ions are held in a rigid formation by the force of attraction between the positive ions and the 'sea' of negative electrons surrounding them. As you go down group 1, however, the atoms become larger so that the positive nucleus gets further away from the negative sea of electrons. The force of attraction between the metal ions and the sea of electrons thus gets weaker down the group and the melting points decrease as less heat energy is needed to overcome this weakening force of attraction. Zack bums COD SAM KEAR LOVES COD SO MUCH SK MYSTERIES. AND REECE TOO

Answer 2

The melting and boiling points of all groups increases as you go down the group, because the particles are more massive and thus require more kinetic energy to break the bonds holding the solid or liquid together.

Answer 3

It increases down the group.

The molecules get larger, have a larger amount of electrons and this increases dispersion forces, causing the said increase The boiling point of the elements will increase because of the increase of the intermolecular forces between the molecules of that element. The stronger the intermolecular forces, the higher the amount of energy required to separate the molecules, resulting in a higher boiling point.

Answer 4

increasing melting points in group 7 is due to increase in size of the elements. so the weak attrative forces between the molecules of Iodine is more then that between in fluorine or chlorine. when size of an element is so large it contains more number of electrons then polarizability occurs, due to this intermolecular forces arises and molecules are held together by a weak attractive force hence melting point increases.

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Answer 5

as u go down a group , with increase in the Atomic Mass vanderwaal's force of attraction increases, thus increasing the melting and boiling point.Intermolecular forces. If we consider just atoms (not in molecules, and not ions) they have no charge associated with them. Therefore, the only intermolecular forces possible between them are London dispersion forces (remember, they are temporary dipoles). There are several reasons to answer your question. So in an atomic solid of the individual atoms in group 7, only London dispersion forces are active. Now, as we move down the group, atomic size and the number of electrons present increases. So more electrons present means that a larger temporary dipole can be present at any one instant, resulting in larger London dispersion forces. A second and perhaps better explanation is based on polarizability. In terms of electronegativity, F > Cl > Br > I

Therefore distorting the electron clouds of I is easier than distorting Br, and so on. Polarizability is essentially a measure of how well and electron responds to a change in an electric field around it. Since F is the least polarizable, its electrons are held tight and thus London dispersion forces are weaker. I holds it electrons loosely and is more polarizable and there its electrons can respond to a higher degree to the change in the electric field. Therefore fluorine has the weakest intermolecular forces and iodine has the greatest. Stronger intermolecular forces result in a higher melting point.

Answer 6

This is because as we move down the group due to increase in size the electrons are loosely bound to the nucleus and hence it is easy to break there corresponding bond and so m.p and b.p decreases down the group

Answer 7

the atomic sizes increas down the group due to which the dispersion of electronic cloud becom more easy and easy.the result is that strong london

dispersion forces are created due to high polarizbility of atom.these features are prominet in increasin the boiling points of noble gases from top to bottom.For physical properties melting and boiling point hey increses with atomic number since van der waals forces(dipolar forces) increase

with electron numbers

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Answer 8

With the group 7 atoms, they exist as diatomics. You therefore have Van der Walls forces at play. As you go down the group, you add electrons and have a larger atomic radius. You thus have a higher chance of temporary dipoles forming and therefore more attraction between atoms. You have more order at a molecular level due to this, and it requires more energy to change state.

Short answer though: Van der Waals