Question Text
Question 1 :
Which of the following statements about Rutherford’s model of atom are correct?
(i) considered the nucleus as positively charged
(ii) established that the $\alpha$–particles are four times as heavy as a hydrogen atom
(iii) can be compared to solar system
(iv) was in agreement with Thomson’s model
Question 2 :
Which of the following is the correct electron distribution of chlorine atom ? (Atomic number of chlorine is 17).
Question 3 :
Rutherford’s α-particle scattering experiment led to the discovery of the ____________.
Question 4 :
The atomic number of calcium and argon are 20 and 18 respectively, but the mass number of both these elements is 40. What is the name given to such a pair of elements?
Question 5 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d2b1f59b460d7261f60b.JPG' />
Find out the valency of atoms represented by the figure.
Question 7 :
Which of the following scientist identified the 'Concept of nucleus' in the structure of an atom ?
Question 8 :
In response to a question, a student stated that in an atom, the number of protons is greater than the number of neutrons, which in turn is greater than the number of electrons. Do you agree with the statement ? (Yes/No)
Question 9 :
An atom with 3 protons and 4 neutrons will have a valency of
Question 10 :
Which of the following is the correct electron distribution of chlorine atom ? (Atomic number of chlorine is 17).
