Short answer type questions:-
1) What is element?
2) Difference between homogeneous and heterogeneous mixture.
3) Write the latin name of copper and gold.
4) Four properties of mixture.
5) Define atoms and molecules.
6) What is valency ? Mention its type also.
7) Define ions and radicals.
8) Identify the radicals a) (HCO 3 ) – b) (HSO 3 ) —
Please help me.
Answers
1) element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.
2) in the attachment
3) (I) copper is a transition metal that is represented by the chemical symbol 'Cu'. This symbol is derived from Latin word cuprum. (II) Gold is a metallic element represented by the chemical symbol 'Au'. This symbol is derived from Latin name of gold 'Aurum'.
4)
.It is an impure substance.
.No formula.
Can be mixed in any ratio.
.It is either homogeneous or heterogeneous.
5) A tiny particle of a chemical element is called an atom, which may or may not exist independently. Molecules refer to the group of atoms that the bond binds together, representing the smallest unit in a compound.
6) Valency of an element is the combining capacity of the atoms of the element with atoms of the same or different elements. There are two types of valency : Electrovalency and covalency.
7) An ion carries a charge, that means that the number of electrons and protons do not match. ... A radical has an unpaired electron, but does not have a net charge because the number of protons equals the number of electrons.
8) Bicarbonate, also known as HCO3,
Acidic radical as HNO3