EVERYDAY SCIENCE

SCIENCE

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
One of Dalton’s conclusions concerning his atomic theory was that all atoms of the same element are-
A
combined
B
different
C
reacted
D
the same
Explanation: 

Detailed explanation-1: -Dalton based his theory on the law of conservation of mass and the law of constant composition. The first part of his theory states that all matter is made of atoms, which are indivisible. The second part of the theory says all atoms of a given element are identical in mass and properties.

Detailed explanation-2: -Conclusion. According to Dalton’s atomic theory, all matter is made up of atoms, which are indestructible and indivisible building blocks. While an element’s atoms were all the same size and mass, various elements possessed atoms of different sizes and masses.

Detailed explanation-3: -Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. Atoms cannot be created or destroyed. Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compound atoms.

Detailed explanation-4: -Dalton’s atomic theory stated that atoms of different elements combine in simple whole-number ratios to form compounds. Dalton thought that all atoms of a specific element have the same mass. Democritus proposed that atoms are held together by chemical bonds, but no one believed him.

Detailed explanation-5: -Dalton’s assumption that all atoms of the same element are equal in their properties is not valid. The reason for the inaccuracy of this assumption is the existence of isotopes. Namely, isotopes are atoms of the same chemical element that differ in the number of neutrons in the nucleus.

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