Bohr's theory can be applied to the hydrogen-like species `(He^(+), Li^(2+),Be^(3+)`, and so on). With the increase of `Z` (atomic number), the value of enegry becomes_____and that of radius becomes________.

The radius ratio of Bohr's first orbit of hydrogen like species He^(+),Li^(2+),Be^(3+) is

Bohr's theory is not applicable to which of the following species? (1) H, (2) H^(+) , (3) He^(+) , (4) Li^(2+) .

bohr's theory is not applicable to which of the following species? (i) H , (ii) He^(2+) , (iii) Be^(3+) , (iv) B^(4+) .

Consider the following statements (I) Bohr's theory can also be used to explain the spectra of He^(+) ion (II) Energy of an electron in the first Bohr orbit of hydrogen atom is -13.6eV (III) Bohr's theory is only applicable to hydrogen atom and not to any other species (IV) The energy of an electron in a hydrogen atom is quantised The correct statements are

The shortest wavelength of Lyman series of the hydrogen atom is equal to the shortest wavelength of Balmer series of a hydrogen -like atom of atomic number Z. The value of Z is equal to

The shortest wavelength of Lyman series of the hydrogen atom is equal to the shortest wavelength of Balmer series of a hydrogen -like atom of atomic number Z. The value of Z is equal to

4^(th) Bohr orbit of a hydrogen like one electron species X coincide with first Bohr orbit of H atom. The number of positive charges in the nucleus of the species X is

Assertion : For hydrogen like species, energy of an electron in a particular orbit increases with increase in value of Z. Reason : Electronegativity decreases across a period.