Chemistry, asked by Kogami2464, 10 months ago

First how does atomic size vary along the group give reason second what are the metals electropositive in nature third what are the metalloids give an example

Answers

Answered by thecoolnishtha

1. Atomic size DECREASES along the group. This may sound weird because the atomic number increases along the group, put due to a larger number is electrons in the valence shell and a larger number of protons in the nucleus, the valence shell is closer to the nucleus due to the increases electrostatic force of attraction between protons and the valence electrons.

2. Metals have less electrons in their valence shells and losing them uses less energy than gaining many electrons to complete their octet. For example a potassium atom has 1 valence electron so it can easily lose it but gaining 7 electrons takes up a lot of energy. When it loses electrons, the positive charge increases in comparison, and this is why metals are said to be electro positive in nature.

3. Metalloids are substances which show characteristics of both metals and non metals. eg they may be sonorous and lustrous like metals but form anions like non metals. Eg. silicon, germanium etc.

thecoolnishtha: Oops sorry in the first part, i wrote the other way round. What i wrote is for a period. in a group, the number of shells increases which increases the atomic size. My sincere apologies for this error.

Answered by ammiamrin2007

Answer:

A metalloid is a chemical element that exhibits some properties of metals and some of nonmetals. ... Boron, silicon, germanium, arsenic, antimony, tellurium, and polonium are metalloids. In some cases, authors may also class selenium, astatine, aluminum, and carbon as metalloids, but this is less common.

Elements: Germanium; Polonium; Silicon; Selen

Explanation:

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