Structure of At...

If uranium (mass no. 238 and atomic no. 92) emits $$\alpha$$ -particle, the product has mass number and atomic number:

The amount of energy which is released due to addition of extra electron to the outermost orbit of gaseous atom is called 

Aufbau principle is not satisfied by 

Aufbau principle is obeyed in which of the following electronic configurations 

Correct energy value order of

Which of the following explains the sequence of filling the electrons in different shells 

Which of the following property displays progressive increase down a group in the Bohr's periodic table

The number of elements in the $$5^{th}$$ period of the periodic table are

Out of all the known elements the number of transitional elements is  

In transition elements, the orbitals partially filled by electrons are