Chemistry
Fill in the blanks with the correct words from the brackets.
A molecule of an element is …………… [water/chlorine/ammonia].
A radical with one atom of sulphur and three atoms of oxygen is …………… [bisulphite/sulphate/sulphite].
An element with variable valency is …………… [sodium/copper/calcium]
The formula of aluminum sulphate is …………… [AlSO4 / Al2(SO4)3 / Al3(SO4)2]
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group …………… [2/1]
Atomic Structure
27 Likes
Answer
A molecule of an element is chlorine.
A radical with one atom of sulphur and three atoms of oxygen is sulphite.
An element with variable valency is copper.
The formula of aluminum sulphate is Al2(SO4)3.
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group 1.
Answered By
15 Likes
Related Questions
'Dilute hydrochloric acid is added to sodium hydroxide'. Give a word equation and a molecular equation of the same. Is the equation written, a balanced equation. Give reasons.
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
Select the correct answer from A, B, C, D and E for each statement given below-
A: Molecule B: Orbits C: Atom D: Valency E: Radical
The basic unit of matter not capable of independent existence.
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
An elementary particle of matter – of a group of atoms of different elements behaving as a single unit with charge on the group.
Imaginary path around the nucleus of an atom in which electrons revolve.
The term for the combining capacity of an element or the number of hydrogen atoms with which it combines or replaces.
Match the radicals in List I with their correct names from List II.
List I List II 1. NO31- A: Bisulphite 2. HSO41- B: Phosphate 3. SO42- C: Carbonate 4. PO43- D: Nitrite 5. HCO31- E: Bicarbonate F: Sulphate G: Nitrate H: Phosphite I: Sulphite J: Bisulphate