Tag: atomic theory of dalton

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

The existence of isotopes violated which one of the postulates of Dalton's 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
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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

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

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

  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.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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

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

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

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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

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

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

  1. M

  2. Cl

  3. Mn

  4. C
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. an atom.

  2. an ion.

  3. an electron.

  4. a molecule.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

The atom is indivisible was proposed by :

  1. Rutherford

  2. Dalton

  3. Bohr

  4. Einstein
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

The valence electrons of an element are responsible for :

  1. physical properties of an element

  2. chemical properties of an element

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Dalton viewed chemical change as :

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.