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Ask QuestionPosted by Good Student 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Atomic number of Sodium (Na) – 11
Electronic configuration of Sodium – 1s2 2s2 2p6 3s1
It has one valence electron, it will lose one electron to get octet configuration
Atomic number of Oxygen (O) – 8
Electronic configuration of Oxygen – 1s2 2s2 2p4
It is two electrons short of octet configuration, thus it will gain two electrons.
During the bond formation between Sodium and Oxygen, two Sodium atoms loses one electron each to Oxygen atom.
2 Na -2e- → 2Na+
O + 2e- → O-2
2Na+ + O-2 → Na2O
Atomic number of Magnesium (Mg) – 12
Electronic configuration of Magnesium – 1s2 2s2 2p6 3s2
It has two valence electrons, it will lose two electrons to get octet configuration
Atomic number of Oxygen (O) – 8
Electronic configuration of Oxygen – 1s2 2s2 2p4
It is two electrons short of octet configuration, thus it will gain two electrons.
During the bond formation between Magnesium and Oxygen, one Magnesium atom loses two electrons to Oxygen atom.
Mg -1e- → Mg2+
O + 2e- → O-2
Mg+2 + O-2 → MgO
Posted by Krishan Kadian Kadian 5 years, 8 months ago
- 2 answers
Yogita Ingle 5 years, 8 months ago
2x2 -5x + 3
= 2x2 - 2x -3 x + 3
= 2x(x - 1) - 3 ( x - 1)
= (x -1) (2x - 3)
Posted by Akash Barjo 5 years, 8 months ago
- 1 answers
Yogita Ingle 5 years, 8 months ago
The development of nationalism in Europe was not only the result of war and territorial expansion.
Culture played an important role in creating the idea of the nation in Europe. The following examples state the fact
(i) Art, poetry, stories and music helped express and shape nationalist feelings in-Europe.
(ii) Romanticism, a cultural movement in Europe developed a particular form of nationalist sentiment. Romantic artists and poets criticised the glorification of science and reason. They tried to create a sense of a shared collective heritage as the basis of a nation. They gave importance on emotions, intuitions and mystical feelings.
(iii) German philosopher Johann Gottfried Herder claimed that true German culture was to be discovered among the common people (das volk) in their folk song, folk poetry and folk dances.
(iv) Vernacular languages and folklores strengthen the national spirit.
(v) In Poland Karol Kurpinski cekbrated the national struggle through opera and music.
(vi) Allegory of Germania and Marianne developed national feelings among citizens.
Posted by Meenakshee Kesavan 5 years, 8 months ago
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Posted by Life Is Full Of Struggle 5 years, 8 months ago
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Posted by Kiran Sandhu 5 years, 8 months ago
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Gaurav Seth 5 years, 8 months ago
Sustainable development refers to the process economic development where resources are used judiciously to satisfy needs of not only present generation but also to conserve them for the use of future generations. Sustainable development takes places without depleting the present natural resources.
Posted by Shubham Sonu 5 years, 8 months ago
- 2 answers
Gaurav Seth 5 years, 8 months ago
Body mass index is bmi
it is used to determine whether an adult is undernourished or not it is calculated by weight by the square of height
if it is less than 18.5 then the person is undernourished and if it is more than 25 than it is overweight
Posted by Shubham Sonu 5 years, 8 months ago
- 1 answers
Gaurav Seth 5 years, 8 months ago
|
Open Unemployment |
Disguised unemployment |
|
(i) Open employment refers to the situation in which an individual has no job and unable to earn his livelihood. |
(i) Disguised unemployment refers to the situation in which people work at a place where there is no more people are requird. The situation in which people are apparently working but all of them are made to work less then their potential. |
|
(ii) This unemployment is clearly visible. |
(ii) This unemployment is hidden. |
|
(iii) People's unemployment will affect the production of goods and services in an economy. |
(ii) People's unemployment won't affect the production of goods and services because here already more than requirement of people are working so if they leave that's not a big deal. |
Posted by Yogesh Meena 5 years, 8 months ago
- 1 answers
Gaurav Seth 5 years, 8 months ago
Question : Find the series if an=9−5n
Given
an=9−5n
a1=9−5=4
a2=9−10=−1
a3=9−15=−6
∴ The series is 4,−1,−6,−11....
Posted by Elizabeth Mary 5 years, 8 months ago
- 2 answers
Gaurav Seth 5 years, 8 months ago
Let’s assume the two numbers be x and y. And also assume that x is greater than or equal to y.
So as per the question, we can write the sum of the two numbers as
x + y = 1000 ……….. (i)
Again it’s given that, the difference between the squares of the two numbers, thus writing it
x2 – y2 = 256000
⇒ (x + y) (x – y) = 256000
⇒ 1000(x - y) = 256000
⇒ x – y = 256000/1000
⇒ x – y = 256 ………….. (ii)
By solving (i) and (ii), we can find the two numbers
On adding the equations (i) and (ii), we get;
(x + y) + (x - y) = 1000 + 256
⇒ x + y + x – y =1256
⇒ 2x = 1256
⇒ x = 1256/ 2
⇒ x = 628
Now, putting the value of x in equation (i), we get
628 + y =1000
⇒ y = 1000 – 628
⇒ y = 372
Hence, the two required numbers are 628 and 372.
Posted by Suryansh Singh 5 years, 8 months ago
- 2 answers
Gaurav Seth 5 years, 8 months ago
They are analogus because they have different structure i.e. humans have complete eye but planaria only have light detcting spots but they perform the same function of seeing
Posted by Apurv Sharma 5 years, 8 months ago
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Posted by Abhi Singh 5 years, 8 months ago
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Posted by Soham Mhabdi 5 years, 8 months ago
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Gaurav Seth 5 years, 8 months ago
i). It is the safer place to keep money as compared to the house or a working place.
ii). People can earn interest on the deposited money.
iii). People have the provisions to withdrawn the money as and when they require.
iv). People can also make payment through cheques.
Suryansh Singh 5 years, 8 months ago
Posted by Abhi Singh 5 years, 8 months ago
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Nikita??? Garg 5 years, 8 months ago
Posted by Raman Upadhyay 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
- Gross Domestic Product (GDP) is the market value of the final goods and services produced during a year within the domestic territory of a country.
- Here only final goods and services are counted to avoid the problem of double counting.
- For e.g. a farmer sold wheat to flour mill for Rs. 10 per kg. The mill grinds the wheat and sold the flour to a biscuit company for Rs. 12 per kg. The biscuit company uses the flour, sugar and butter to make 5 biscuit packets. He sold the biscuit to the consumer at Rs. 15 per biscuit packet.
- Here biscuits are the final goods that are purchased by the consumer. Wheat and wheat flour are the intermediate goods used in the production of final good.
- The value of Rs. 75 already includes the value of flour Rs. 12.
- Hence only the value of final goods and services.
Therefore, GDP = Value of output − Intermediate Consumption
Posted by Rahul Gupta 5 years, 8 months ago
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Alok Kumar 4 years, 9 months ago
? Pranali.A.P ? 5 years, 8 months ago
Yogita Ingle 5 years, 8 months ago
Lencho was a hard working farmer. He had grown corn in his field and was waiting for rain anxiously. He was very happy to see the rain but it later turned to worry as the rain became a storm and destroyed his fields. He had deep faith in God and after the destruction of the field, he was hopeful that everything will be all right. Although Lencho was a very strong man and worked hard in the field, his faith in God made him write a letter to God. He asked for hundred pesos from God and was confident of receiving the amount. When he received only seventy pesos he again wrote to God asking for the remaining money and accusing the postal department for stealing money. This shows that Lencho was a religious man.
Posted by Sneha Manhas 5 years, 8 months ago
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? Pranali.A.P ? 5 years, 8 months ago
Posted by Surya 5 years, 8 months ago
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Study ? 5 years, 8 months ago
Posted by Vaibhav (Silent Love)?? Avi 270505??? 5 years, 8 months ago
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Sana(Silent Love).. ?? 5 years, 8 months ago
Posted by Priyanshu Kumar 5 years, 8 months ago
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Srishti Gupta 5 years, 8 months ago
Gaurav Seth 5 years, 8 months ago
- A spherical mirror, whose reflecting surface is curved inwards, i.e. faces towards the centre of the sphere, is called a concave mirror.
Surya 5 years, 8 months ago
Posted by Surya 5 years, 8 months ago
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Posted by Surya 5 years, 8 months ago
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Posted by Surya 5 years, 8 months ago
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Posted by Bharat Kol 5 years, 8 months ago
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Gaurav Seth 5 years, 8 months ago
CONCAVE MIRRORS;
1. They always produce real and inverted images except when an object is placed between the mirror pole and the focus which gives erect virtual images. (for real objects)
2. They produce magnified, diminished and same size images.
3.A parallel beam of incident light is concentrated on its focus and thus such a mirror is called a convergent mirror. Also a light source placed at the focus produces a parallel light beam.
4.Sign convention: The focal length and radius of curvature are taken as negative.
Posted by Surya 5 years, 8 months ago
- 3 answers
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