Dalton's Idea of Atom

Select the correct statements from the following :

A. Atoms of all elements are composed of two fundamental particles.
B. The mass of the electron is $9.10939 \times {10}^{-31} \mathrm{kg}$.
C. All the isotopes of a given element show same chemical properties.
D. Protons and electrons are collectively known as nucleons.
E. Dalton's atomic theory, regarded the atom as an ultimate particle of matter.

Choose the correct answer from the options given below:

Which one of the following are not the subatomic particles present in an atom?

What are the properties of atoms?

 what is an atom?

The concept of atom based on experimental observation first came from:

"All matter is made up of very small particles which cannot be further broken down. These particles are called atoms". This statement is one of the assumptions of :

According to Dalton, atoms of different elements combine with one another to form:

Which part of Dalton's original atomic theory must be modified with the discovery of isotopes?

${}_5{}^{11}\mathrm{B}$ and ${}_6{}^{12}\mathrm{C}$ form a pair of 

Identify an isobar of ${}_6{}^{14}\mathrm{C}$ from the following elements.

Describe the failures of Dalton's atomic theory.

What are isobars? Give examples.

What led to the failure of Dalton's atomic theory?

Explain the reasons for the failure of Dalton's atomic theory.

Dalton's atomic theory was not able to explain which of the following:

Write the main points of the atomic theory given by Dalton.

According to Dalton's atomic theory, all matter is made of

Remaining part of atom except outer orbit is called:-
 

In which one of the following pairs, the two species are both isoelectronic and isotopic ? (Atomic numbers : Ca= 20, Ar= 18, K = 19, Mg= 12, Fe= 26, Na= 11).

Which one is a set of isoelectronic species ?