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What people are asking?

Adithyan Sanal

May 4, 2015

####  Calculate the total number of electrons present in one mole of methane



The molecular formula of methane is CH4.

Tuba

May 18, 2014

#### Calculate the frequency and energy of a photon of radiation having wavelength 3000 Ao.



This answer has an image. Please click on the question to read more.

Tushara

May 1, 2014



Answer.

## No.of waves = circumference of electron orbit / wave length

Tushara

May 1, 2014

#### Pls



For 1st line in Balmer series n1 =2,n2=3
1/λ1= 109678[ 1/n12 -1/n22  ]
=109678[1/...

Dinesh

Aug 10, 2014

#### WHAT IS RADIAL NODE AND ANGULAR NODE? DEFINE AND DIFFRENTIATE?



A node is a point where the electron probability is zero.
For a given orbital there are two types of nodes.
1) Radial node  2) Angular node
Radial node is also called a...

Hrushikesh

Sep 18, 2015

#### Write any four postulates of daltons atomic theory



John Dalton, a British school teacher, published his ...

Ambati

May 3, 2014

#### Maximum number of electrons in a sub shell with l=3& n=4 is;



In this question l=3 means the sub shell is f & n=4 means it is present in 4th orbit.
Finally it is a 4f sub shell.
The no of orbital in f sub shell =2...

Sukirtha

Aug 17, 2014

#### a bulb emits light of wavelength 4500Å.The bulb is rated as 150 watt and 8% of the energy is emitted as light.How many photons are emitted by the bulb per second?



Ans:  Each photon has energy of  hν

Chandra Kant

May 7, 2015

#### The number of electrons, protons and neutrons in a species are equal to 18 , 16 , 16 respectively. assign the proper symbol to the species . and why please explain it briefly?



As we know that atom...

Rejitha Krishnan RG

Sep 11, 2014

#### write the quantam numbers for the last electron in chromium(Z=24)?



The electronic configuration of chromium is 1s2 2s2 2p6 3s2 3p6 4s1 3d5.
The last electron comes in 3d orbital.
Quantum numbers for the last electron in  Cr :
n = 3 ,l= 2, m= +2 , s= +...

Adithyan Sanal

May 4, 2015

####  Calculate the total number of electrons present in one mole of methane



The molecular formula of methane is CH4.

Tuba

May 18, 2014

#### Calculate the frequency and energy of a photon of radiation having wavelength 3000 Ao.



This answer has an image. Please click on the question to read more.

Tushara

May 1, 2014



Answer.

## No.of waves = circumference of electron orbit / wave length

Tushara

May 1, 2014

#### Pls



For 1st line in Balmer series n1 =2,n2=3
1/λ1= 109678[ 1/n12 -1/n22  ]
=109678[1/...

Dinesh

Aug 10, 2014

#### WHAT IS RADIAL NODE AND ANGULAR NODE? DEFINE AND DIFFRENTIATE?



A node is a point where the electron probability is zero.
For a given orbital there are two types of nodes.
1) Radial node  2) Angular node
Radial node is also called a...

Hrushikesh

Sep 18, 2015

#### Write any four postulates of daltons atomic theory



John Dalton, a British school teacher, published his ...

Ambati

May 3, 2014

#### Maximum number of electrons in a sub shell with l=3& n=4 is;



In this question l=3 means the sub shell is f & n=4 means it is present in 4th orbit.
Finally it is a 4f sub shell.
The no of orbital in f sub shell =2...

Sukirtha

Aug 17, 2014

#### a bulb emits light of wavelength 4500Å.The bulb is rated as 150 watt and 8% of the energy is emitted as light.How many photons are emitted by the bulb per second?



Ans:  Each photon has energy of  hν

Chandra Kant

May 7, 2015

#### The number of electrons, protons and neutrons in a species are equal to 18 , 16 , 16 respectively. assign the proper symbol to the species . and why please explain it briefly?



As we know that atom...

Rejitha Krishnan RG

Sep 11, 2014

#### write the quantam numbers for the last electron in chromium(Z=24)?



The electronic configuration of chromium is 1s2 2s2 2p6 3s2 3p6 4s1 3d5.
The last electron comes in 3d orbital.
Quantum numbers for the last electron in  Cr :
n = 3 ,l= 2, m= +2 , s= +...

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