Advertisements
Advertisements
प्रश्न
Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
विकल्प
(i), (ii) and (iii)
(i), (iii) and (iv)
(ii), (iii) and (iv)
(i), (ii) and (iv)
Advertisements
उत्तर
(i), (ii) and (iv)
Explanation -
Dalton’s atomic theory successfully explained law of conservation of mass, law of constant composition and law of multiple proportion
APPEARS IN
संबंधित प्रश्न
If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.
Fill in the blank
An ion with positive charge is called ______
Define: Chemical bond
Name two particles found inside the nucleus. What are they collectively called ?
What are orbits or shells ?
Give two examples for each of ionic and covalent bond.
Write the full form of IUPAC.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
Is it possible to see atoms these days ? Explain your answer.
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Define the following term:
Atom
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
Name the sub-atomic particles.
Give the salient features of “Modern atomic theory”.
What are the 3 most abundant atoms on the earth?
