A recently discovered isotope of the noble element oganesson (symbol ‘Og’) has electronic configuration 2, 8, 18, 32, 32, 18, 8 and mass number 294.Calculate the number of electrons, protons and neutrons in its atom.

29. A negative ion of an atom of element X has 18 electrons and 16 protons. Calculate the number of electrons and protons in its corresponding atom. Also calculate the number of neutrons, if the mass number is 2 units more than double the number of protons.

The elements D [ At. No. 18 ] Have an atomic mass 40

write the number of protons, number of electrons, and electronic configuration of the element and hence, state whether the element is noble gas and why

The elements A [At. No. 2] has atomic mass 4. Write the number of protons, number of electrons, and electronic configuration of the element and hence, state whether the elements is noble gases and why

An element A atomic number 7 mass number 14
B electronic configuration 2, 8, 8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E electronic configuration 2, 8, 8, 1
State (i) valency of each element (ii) which one is metal (iii) which is non-metal (iv) which is inert gas.

The mass number of a particular element which has equal number of protons and neutrons is $32$. What is the electronic configuration of the atom and its stable ion?