METALS AND NONMETALS

An element X on reacting with oxygen forms an oxide X_(2)O . This dissovles in water and truns blue litmus red. State whether the element X is a metal or nonmetal.

Calassify the following elements as metals, nonmetals or metalloids, (a) Sn (b) Br, (c) Mo , (d) Cd, ( e) Si and (f) Xe.

Taking the example of sodium chloride , explain how do metals combine with nonmetals.

Metals are good conductors, while nonmetals are poor conductors of electricity. Give reason

Metals are separated from nonmetals by a diagonal band of semimetals running from top left to bottom right of the____________in the table.

Alloys are prepared by mixing a metal with other metals or nonmetals in certain proportion. The properties of the main metal change when the metal is alloyed. i. How do the properties of iron change when carbon and chromium are mixed with it? ii. How do the properties of copper change when tin is mixed with it?

A scientist was studying reactions of metals and nonmetals. He knew group 1 and 2 elemetals. So, he chooses different elements from group 1, group 2 and group 17. Name the group 17 element which belongs to the same period as sodium.

A scientist was studying reactions of metals and nonmetals. He knew group 1 and 2 elemetals. So, he chooses different elements from group 1, group 2 and group 17. Write the formula of compound formed in the reaction between calcium and fluorine.