Tag: atomic theory of dalton

Questions Related to atomic theory of dalton

The existence of isotopes violated which one of the postulates of Dalton's atomic theory?

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. All matter is made of very tiny particles called atoms

  2. Atoms of a given element are identical in mass and chemical properties

  3. Atoms are indivisible particles and cannot be created nor destroyed

  4. Atoms of same elements are alike in all respects

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Correct Option: D
Explanation:

Isotopes are atoms of same elements having same atomic number but different atomic masses.

Which postulates of Dalton's atomic theory can explain the Law of definite proportion?

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. All matter is made of very tiny particles called atoms.

  2. Atoms of a given element are identical in mass and chemical properties.

  3. Atoms are indivisible particles and cannot be created nor destroyed.

  4. The relative number and kind of atoms in a given compound remain constant.

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Correct Option: D
Explanation:

The law of definite proportion states that in compounds , the elements are always present in definite proportions by mass.

According to Dalton's atomic theory, atoms of a given element are identical in: 

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. chemical properties and size

  2. weight and colour

  3. properties and colour

  4. colour and size

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Correct Option: A
Explanation:

According to atomic theory, atoms of a given element are identical in size and chemical properties.

Which postulate of Dalton's atomic theory is the result of the law of conservation of mass?

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. All matter is made of very tiny particles called atoms

  2. Atoms of a given element are identical in mass and chemical properties

  3. Atoms of different elements have different masses and chemical properties

  4. Atoms are indivisible particles and cannot be created nor destroyed

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Correct Option: D
Explanation:

According to Dalton's  theory atoms are indivisible particles and cannot be created nor destroyed.

Which of the following correctly represents symbol for chlorine in Berzelius system?

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. M

  2. Cl

  3. Mn

  4. C

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Correct Option: A
Explanation:

M correctly represents a symbol for chlorine in Berzelius system. The symbol M was derived from the word Muriatic Radicle which signifies element chlorine. At present, the symbol M is replaced with symbol Cl.

According to Dalton's atomic theory, the smallest particle in which matter can exist is called :

chemistry particle nature, basic units history of atomic model atomic theory of dalton daltons atomic theory

  1. an atom.

  2. an ion.

  3. an electron.

  4. a molecule.

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Correct Option: A
Explanation:

DALTON'S ATOMIC THEORY :

1. Matter is made up of very small undivisible particle called atoms.

2. All the atoms of a given element is identical in all respect i.e. mass, shape, size, etc.

3. Atoms cannot be created nor destroyed by any chemical process.

4. Atoms of different elements are different in nature.

The atom is indivisible was proposed by :

chemistry particle nature, basic units history of atomic model atomic theory of dalton daltons atomic theory

  1. Rutherford

  2. Dalton

  3. Bohr

  4. Einstein

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Correct Option: B
Explanation:

John Dalton considered that " all matter is composed of small particle called the atom."
According to Dalton: 
-Atom is the smallest indivisible part of matter which takes part in the chemical reaction.
-Atom is neither created nor be destroyed.

The valence electrons of an element are responsible for :

chemistry particle nature, basic units history of atomic model atomic theory of dalton daltons atomic theory

  1. physical properties of an element

  2. chemical properties of an element

  3. Both A and B

  4. None of the above

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Correct Option: B
Explanation:

Valence electrons are electrons in the outermost shell and they are responsible for determining the number of bond formation and an atoms charge.This give the atom its chemical properties.

The atomic theory of matter was proposed by :

chemistry particle nature, basic units history of atomic model atomic theory of dalton daltons atomic theory

  1. John Kennedy

  2. Lavoisier

  3. Proust

  4. John Dalton

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Correct Option: D
Explanation:

The atomic theory of matter was proposed by John Dalton.

John Dalton (1766-1844) developed the first useful atomic theory of matter.

Dalton viewed chemical change as :

chemistry particle nature, basic units history of atomic model atomic theory of dalton daltons atomic theory

  1. a transfer of electrons

  2. a transfer of protons

  3. a rearrangement of atoms

  4. a change of atoms from one type into another

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Correct Option: C
Explanation:

Dalton Atomic theory postulates-

1.  All matter is made up of atoms
2. All atoms of a given element are identical in mass and properties
3. Compounds are formed by combining two or more different kind of atoms.
4. A chemical reaction is a rearrangement of atoms.