Chemistry, 29.08.2019 23:30 alyssatamayo641

Shiny metallic solid unreactive good electrical conduct ductile density 10.5

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There are several elements in the Periodic Table that are both malleable and good conductors of electricity and even heat. The Alkali metals such as potassium and sodium from Group 1 of the Periodic Table are very good conductors of electricity and are also pliant and malleable. From the group of Transition metals iron, copper, silver and gold are instances of all the 38 metals of this group that fulfil the conditions of being conductors and malleable. Some metals such as tin, lead, thallium, and aluminium are instances of elements that are malleable and can conduct electricity in the solid form. These elements belong to the Metalloids group in the Periodic Table.

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answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form( $n_2$ ) .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

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