26. Give reasons, 1) Antimony is called a metalloid. 2)There is an anomaly when it comes to the position of Hydrogen. 3)Atomic radius decreases in moving from left to right along a period.
Answers
Answer:
1) A series of six elements called the metalloids separate the metals from the nonmetals in the periodic table. The metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. ... They are semiconductors because their electrons are more tightly bound to their nuclei than are those of metallic conductors.
2) Hydrogen resembles both alkali metals and halogens. It can lose one electron like alkali metals and also gain one electron like halogens. ... Therefore, position assigned to hydrogen in the periodic table is considered anomalous.
3) The atomic radius of atoms generally decreases from left to right across a period. ... Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level. These electrons are gradually pulled closer to the nucleus because of its increased positive charge.
Explanation:
Answer:
1) A series of six elements called the metalloids separate the metals from the nonmetals in the periodic table. The metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. ... They are semiconductors because their electrons are more tightly bound to their nuclei than are those of metallic conductors.
2) Hydrogen resembles both alkali metals and halogens. It can lose one electron like alkali metals and also gain one electron like halogens. ... Therefore, position assigned to hydrogen in the periodic table is considered anomalous.
3) The atomic radius of atoms generally decreases from left to right across a period. ... Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level. These electrons are gradually pulled closer to the nucleus because of its increased positive charge.
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