Which of the following are the postulates of Dalton-s atomic theory-Atoms cannot be subdivided- created or destroyed-Atoms of same element are similar in shape and mass-Elements are made of extremely small particles called atoms-Atoms contain mostly empty space-

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Standard VIII

Chemistry

Dalton Atomic Theory

Which of the ...

Question

Which of the following are the postulates of Dalton's atomic theory?

Atoms cannot be subdivided, created or destroyed.

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Atoms of same element are similar in shape and mass.

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Elements are made of extremely small particles called atoms.

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Atoms contain mostly empty space.

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Solution

The correct options are
A Atoms cannot be subdivided, created or destroyed.
B Atoms of same element are similar in shape and mass.
C Elements are made of extremely small particles called atoms.
According to Dalton's atomic theory:
$∙$ Matter is made up of indivisible particles called atom.

$∙$ Atoms cannot be created nor be destroyed.

$∙$ Atoms of the same element are similar in shape and mass but differ from that of atoms of other elements.
It was proved later by Rutherford that most of the space of an atom is empty and the mass of an atom is concentrated in the nucleus.

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(a) Dalton said that _______________ could not be divided.

(b) An ion which has a positive charge is called a _______________

(d) The _______________ of an atom is very hard and dense.

(e) Neutrons are __________________ particles having mass equal to that of portons.

(f) Isotopes are the atoms of __________________element having the __________________atomic number but __________________mass number.

if atoms are created when man-made elements are made then how does that justify Dalton's 3rd postulate that states atoms can neither be created nor destroyed in a chemical reaction??

Q. The third postulate of Dalton's atomic theory states that "Atoms of given elements are identical in mass and chemical properties". True or False?

Which of the following statements are incorrect according to Dalton’s atomic theory?

I) Atoms of every element have same mass and chemical properties.

II) Atoms combine in simple whole number ratios to form compounds.

III) In a chemical reaction, few atoms are created, and few are destroyed.

Mass is the amount of matter in something. As per the first postulate of Daltons atomic theory, all matter is made up of atoms. The third postulate of the same theory asserts that atoms can be neither created nor destroyed in a chemical reaction, i.e., the total number of atoms and their mass should remain the same before and after the reaction. This is the same as the law of conservation of mass.how

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