Which one of the following will show the tyndall effect? a. fog b. water c. olive oil d. oxygen gas

The most negative electron affinity is most likely associated with small nonmetal atoms.

Further explanation:

Electron affinity:

Electron affinity is the release of energy when an electron is added to a neutral atom to form an anion. Greater the energy released, greater will be the ability of neutral atom to attract electrons and become negatively charged.

The reaction for electron affinity is as follows

Here, X is a neutral atom.

Electron affinity depends upon the size of atom. More the size less will be the attraction to the nucleus as the distance between the nucleus and outermost electron will be more.

As we move down the group, as atomic radius increases from top to bottom, the attraction of electrons to the nucleus will be less resulting in decrease electron affinity.

As we move along the period, as the atomic radius decreases from left to right, the attraction of electrons to the nucleus will be more and hence electron affinity will increase.

Electrons affinity increases from metal to nonmetal as metal is on the left side of the periodic table while nonmetals are present on the right side of the periodic table.

Large nonmetal has electron affinity more than metal because of the small size of nonmetals as compared to metals. On the other hand, large nonmetals are large in size as compared to small nonmetal and therefore has less electron affinity compared to small nonmetal.

Small nonmetal has large electron affinity than metal because of the small size of nonmetals as compared to metals. On the other hand, small nonmetals are small in size as compared to large nonmetal and therefore has more electron affinity compared to large nonmetal.

Large metals lie on the left side of the periodic table and have small size and therefore less negative electron affinity as compared to nonmetals. While the large metals are large in size as compared to small metal and therefore has less electron affinity compared to small metal.

Small metals lie on the left side of the periodic table and have small size and therefore less negative electron affinity as compared to nonmetals. While the small metals are small in size as compared to large metal and therefore has more electron affinity compared to large metal.

Therefore, small nonmetals have most negative electron affinity.

Learn more

1. Which type of bond formed between water

2. Intermolecular forces of attraction

Answer details

Grade: High school

Subject: Chemistry

Chapter: Periodic properties

Keywords: Electron affinity, metals, nonmetals, group, period, increases, decreases valence electrons, and size.