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aniked [119]
3 years ago
7

If you were asked to describe metals and magnetism you could say. A. non–paired electrons spin in opposite directions in all met

als, creating a magnetic field. B. metals are magnets because they have more electrons than non–magnetic materials. C. metals can become magnetic if they have many spinning electrons that create magnetic fields. D. the electrons in some metals pair up to create a magnetic field.
Chemistry
2 answers:
I am Lyosha [343]3 years ago
5 0

The correct answer is C;  Metals can become magnetic if they have many spinning electrons that create magnetic fields.

Further Explanation;

As long as there are many spinning electrons anything metal will become magnetic. Ferromagnetic is when there are only some certain types of metals that are attracted to magnetic. If you were to make an electromagnet, you would only need to take an insulated wire and wrap it around the metal that has ferromagnetic properties.

Learn more about magnetism at brainly.com/question/1228801

#LearnwithBrainly

attashe74 [19]3 years ago
3 0

Answer : Option D) the electrons in some metals pair up to create a magnetic field.


Explanation : Most of the metals are magnetic in nature including some exceptions. When the unpaired electrons get aligned with the magnetic field they posses magnetism. Also there are some paired electrons in metals which align themselves according to the magnetic field and create magnetism in them.

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When a hydrogen atom makes the transition from the second excited state to the ground state (at -13.6 eV) the energy of the phot
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Answer : The energy of the photon emitted is, -12.1 eV

Explanation :

First we have to calculate the 'n^{th}' orbit of hydrogen atom.

Formula used :

E_n=-13.6\times \frac{Z^2}{n^2}ev

where,

E_n = energy of n^{th} orbit

n = number of orbit

Z = atomic number  of hydrogen atom = 1

Energy of n = 1 in an hydrogen atom:

E_1=-13.6\times \frac{1^2}{1^2}eV=-13.6eV

Energy of n = 2 in an hydrogen atom:

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Energy change transition from n = 1 to n = 3 occurs.

Let energy change be E.

E=E_-E_3=(-13.6eV)-(-1.51eV)=-12.1eV

The negative sign indicates that energy of the photon emitted.

Thus, the energy of the photon emitted is, -12.1 eV

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