Entry Test MCQ :: Atomic Structure

@ : Home > Chemistry > Atomic Structure

31.

The correct electronic configuration of Cu is

A.	[Ar]4s1	B.	[Ar]4s2
C.	[Ar]3d104s1	D.	[Ar]3d94s2

32.

Pfund series are produced in the spectrum of hydrogen atom

A.	when electrons jump down to 2nd- orbit	B.	when electrons jump down to 3rd- orbit
C.	when electrons jump down to 4th- orbit	D.	when electrons jump down to 5th- orbit

33.

Atomic orbits having same evergy are called

A.	Degenerate orbitals	B.	Bonding molecular orbitals
C.	Anti bonding molecular orbitals	D.	Half filled orbitals

34.

Sommerfelds modification in Bohrs model is

A.	Orbit is cylindrical	B.	Orbit is elliptical
C.	Orbit is longitudinal	D.	Orbit is asymmetrical

35.

When electrons collide with heavy metals than ______ are produced.

A.	Beta-rays	B.	Alpha-rays
C.	X-rays	D.	Gamma-rays

36.

Plancks equation is

A.	E = mc2	B.	mvr = nh/2?
C.	E = h?	D.	? = h/mv

37.

Atom with higher atomic number produces X-rays of

A.	Shorter wavelength	B.	Larger wavelength
C.	X-ray not produced	D.	All are possible

38.

Wavelength of electron was verified by

A.	Moseley	B.	Davisson and Germer
C.	Einstein	D.	Roentgen

39.

Space around nucleus where finding probability of electrons is maximum is called

A.	Orbital	B.	Orbit is elliptical
C.	subshell	D.	Electron cloud

40.

Quantum number which tells the energy of electron is

A.	n	B.	1
C.	m	D.	s