Dalton's Atomic Theory and Its Limitations
Tests knowledge of John Dalton's atomic theory including its postulates, merits, and how later discoveries like isotopes disproved certain aspects of the theory
Questions
______ are the smallest unit of matter that can take part in a chemical reaction.
- Molecules
- Compounds
- Atoms
- Electrons
Dalton's theory fails to determine the existence of
- molecules
- compounds
- allotropes
- All of the above
According to Dalton, atoms of different elements combine with one another to form :
- compounds
- elements
- solution
- All of the above
Dalton had suggested that an atom is indivisible.
- True
- False
Which of the following is a postulate of Dalton's atomic theory?
- All matter consists of indivisible particles called atoms
- The atom is the smallest unit of matter that can take part in a chemical reaction
- Atoms of same element can combine in more than one ratio to form two or more compounds
- All of the above
Dalton's theory of same element have same mass and properties was proved wrong with the invention of:
- molecules
- isotopes
- neutrons
- compounds
A/An______ is the smallest particle of a substance which can take part in a chemical reaction.
- atom
- molecule
- both A and B
- none of the above
Various theories were put forth to study the nature of atom. The main postulates of Dalton's atomic theory are :
- all matter are composed of atoms
- all matters are composed of molecules
- all atoms of an element are identical.
- the atoms of different elements vary in size and mass.
Dalton suggested that atoms were indestructible and unchangeable to explain:
- why mass is conserved in chemical reactions.
- why elements combine in fixed weight ratios to form compounds.
- why elements are characterized by the mass of their atoms.
- why compounds combine in fixed weight ratios in chemical reactions.
Which of the following is not a postulate of Dalton's atomic theory?
- Different elements have atoms of different masses.
- Atoms combine in simple whole number ratios to form compounds..
- Atoms are not created or destroyed in chemical change.
- Atoms of a single element can have different masses.
Dalton said that elements are distinguished from each other by :
- the charge on their ions
- the density of their solid forms
- the weights of their atoms
- the shapes of their atoms
Who was the first scientist which proposed that "Matter is made up of indivisible particles called atoms"?
- Lavoiser
- Dalton
- Thomson
- Faraday
Atoms of different elements combine in :
- unequal ratios.
- prime number ratios.
- equal ratios.
- whole number ratios.
Dalton's atomic theory was not accepted fully :
- when atoms combine It must be presumed to be a binary one, unless some cause appear to the contrary.
- when elements react, their atoms sometimes combine in more than one simple, whole-number ratio.
- elements are characterized by the mass of their atoms.
- None of the above
Which of the following is a merit of Dalton's atomic theory?
- Laws of chemical combination
- Distinction between the fundamental particle of an element (atom) and that of a compound (molecule)
- Both A and B
- None of the above
Among the following, which one can not be further broken down by chemical means?
- Cation
- Inert Gas
- Crystal
- Anion
- Element
Which one proposes the basic postulates concerning elements and atoms?
- Avogadro's number
- $P _1V _1=P _2V _2$
- $V _1T _2=V _2T _1$
- Dalton's theory
- Gay-Lussac's Law
Which of the following is not part of the Atomic Theory?
- Compounds are made up of combinations of atoms
- All atoms of a given element are alike
- All matter is composed of atoms
- A chemical reaction involves the rearrangement of atoms
- The atom is mainly empty space
An important postulate of Dalton's atomic theory is:
- an atom contains electrons, protons and neutrons
- atom can neither be created nor destroyed nor divisible
- all the atoms of an element are not identical
- all the elements are available in nature in the form of atoms
According to Dalton, what are the smallest particles of matter?
- Molecules
- Ions
- Atoms
- None of the above
Which of the following is not a postulate of Dalton's atomic theory?
- All matter is made of very tiny particles called atoms
- Atoms of a given element are not identical in mass and chemical properties
- Atoms combine in a ratio of small whole numbers to form compounds
- The relative number and kinds of atoms are constant in a given compound
Atoms combine with each other to ________ each other.
- stabilize
- attain alkali metal configuration
- reduce their mass
- none of the above
According to Dalton's atomic theory, atoms combine in a small number ratio to form :
- big atoms
- compounds
- elements
- ions
Which one of the following is not a subatomic particle?
- Proton
- Neutron
- Electron
- Positron
John Dalton proposed which theory?
- Theory of molecules
- Atomic mass theory
- Theory of atoms
- Law of conservation of substances
What are the merits of Dalton's atomic theory?
- Explains laws of chemical combination
- Distinguishes between fundamental particles of element
- Both A and B
- Proves individuality
Dalton based his relative atomic weight scale on :
- hydrogen
- oxygen
- helium
- lithium
- carbon
The existence of isotopes violated which one of the postulates of Dalton's atomic theory?
- All matter is made of very tiny particles called atoms
- Atoms of a given element are identical in mass and chemical properties
- Atoms are indivisible particles and cannot be created nor destroyed
- Atoms of same elements are alike in all respects
Which postulates of Dalton's atomic theory can explain the Law of definite proportion?
- All matter is made of very tiny particles called atoms.
- Atoms of a given element are identical in mass and chemical properties.
- Atoms are indivisible particles and cannot be created nor destroyed.
- The relative number and kind of atoms in a given compound remain constant.
According to Dalton's atomic theory, atoms of a given element are identical in:
- chemical properties and size
- weight and colour
- properties and colour
- colour and size
Which postulate of Dalton's atomic theory is the result of the law of conservation of mass?
- All matter is made of very tiny particles called atoms
- Atoms of a given element are identical in mass and chemical properties
- Atoms of different elements have different masses and chemical properties
- Atoms are indivisible particles and cannot be created nor destroyed
According to Dalton's atomic theory, the smallest particle in which matter can exist is called :
- an atom.
- an ion.
- an electron.
- a molecule.
The atom is indivisible was proposed by :
- Rutherford
- Dalton
- Bohr
- Einstein
The valence electrons of an element are responsible for :
- physical properties of an element
- chemical properties of an element
- Both A and B
- None of the above
The atomic theory of matter was proposed by :
- John Kennedy
- Lavoisier
- Proust
- John Dalton
Dalton viewed chemical change as :
- a transfer of electrons
- a transfer of protons
- a rearrangement of atoms
- a change of atoms from one type into another
On the basis of assumptions Dalton explain __________.
- Law of definite proportion.
- Law of conservation of mass.
- Law of combining volume.
- Law of reciprocal proportion.
Choose the correct option :
Dalton's atomic theory suffered from _________.
- Atoms of the same or different types have a strong tendency to combine together to form a new group of atom
- The atom can no longer be considered indivisible
- Discovery of isotopes indicated that all atoms of the same element are not perfectly identical
- All of the above
On which basis later researches proved that Dalton's atomic theory was not wholly correct :
- An atom is the ultimate
- Discrete particle of matter
- Indivisible particle of matter
- All of the above
Law of constant proportion is given by _________.
- Thompson
- Dalton
- Joseph Louis Proust
- None of these