Option D = No, when elements combine to form a new material, they have properties unique to the new materials.
Explanation:
When sodium contact with water it loses its one electron and thus gain positive charge. When there are more sodium atoms present and many atoms do this thus more positive ions are produced and these positive ions repeal each other at high speed and explosion occur.
But when it form compound with other material, it will not showed this behavior.
Example:
Consider the sodium chloride, when it dissolve in water sodium not showed explosion. In sodium chloride sodium already gives its electron to the chlorine and have stable electronic configuration. The sodium present in cationic form. When it dissolve, partial positive charge of water surrounds the Cl⁻ and partial negative charge of water surrounds the Na⁺ ion, ans sodium chloride gets dissolve into water without explosion.
D.No, when elements combine to form a new material, they have properties unique to the new material
Explanation:
Sodium(Na) and all other group one element are usually very reactive when it get combine with an elements or compounds . The reactive nature is due to their ability to easily give out it single outer electron to an available negative ion.
compounds for example sodium chloride(Nacl), sodium tetraoxosulphate(vi)(Na2So4), having a sodium content have properties unique to the new compound . Sodium chloride as a compound which has a different texture, color and shape from sodium is due to it combinedelement(sodium and chlorine) which makes up it constituents.
The reactants has 2 NO2 and the product has 3. So we need to make sure we have 6 on each side. Al + 3Fe(NO2)2 -> Fe + 2Al(NO2)3 This leaves us with us just to balance the Fe And Al 2Al + 3Fe(NO2)2 -> 3Fe + 2Al(NO2)3
