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  • 5 answers

Tanisha ?? 5 years, 7 months ago

1. There was a regular gradation in physical and chemical properties of elements. 2. The group number of an element indicates highest oxidation state that it can attain. 3. There were many vacant spaces in Mendeleev's periodic table for the elements to be discovered. He  named them Eka-Boron, Eka-Aluminium and Eka-silicone He also predicted the properties of these  undiscovered elements including atomic masses. These elements were discovered as Sc ,Ga and Ge  with same features as he predicted. 4. Mendeleev’s arrangement helped to correct atomic masses of a number of elements.

Ishika ? 5 years, 7 months ago

2. When noble gasses was discovered hel could add it to periodic table without any major change.☺️☺️☺️

Ishika ? 5 years, 7 months ago

1. He left blank places which help scientists to discover new element.??

Raman Upadhyay 5 years, 7 months ago

Thanks and welcome back

Lucifer ? Morningstar? 5 years, 7 months ago

Some gaps were left for the elements yet to be discovered. Thus, if a certain new element is discovered, it can be placed in a new group without disturbing any existing group.
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  • 5 answers

Manya Mahajan 5 years, 6 months ago

H2SO4

Pratibha Shukla 5 years, 7 months ago

??

Ishika ? 5 years, 7 months ago

Thanks to both...??

Pratibha Shukla 5 years, 7 months ago

Mineral acids are stronger acids than carboxylic acids because mineral acids are completely ionised where as carboxylic acids are partially ionised

Lucifer ? Morningstar? 5 years, 7 months ago

H2So4,HNO3
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Somesh Kumar Sahu 5 years, 7 months ago

the substance used for oxidation of ethanol is alkaline pottasium permenangnent (KMnO4) or acidic pottasium dichromonate(K2Cro7)

Raman Upadhyay 5 years, 7 months ago

Sodium dichromate is used for oxidation of ethanol.

Ishika ? 5 years, 7 months ago

Thank you.....☺️☺️☺️

?Ritesh Gupta☺️ 5 years, 7 months ago

Hi

Lucifer?? Morningstar?? 5 years, 7 months ago

By acidified sodium dichromate.
  • 1 answers

Jaat Devta 5 years, 6 months ago

In computer networking broadcasting is the process of sending data packets to multiple recipients all at once
  • 2 answers

Ishika ? 5 years, 7 months ago

Thanks???

Lucifer?? Morningstar?? 5 years, 7 months ago

Because the combustion is complete and no unburnt carbon particles are released.
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Meghna Thapar 5 years, 6 months ago

Developmental goals are learning-oriented. They spell out the skills, knowledge and experiences the employee needs to either remain effective in his/her current job or support the employee's ability to take on new responsibilities and grow in his/her career. There are 3 types of goals: Outcome goals, process goals, and performance goals. Each of the 3 types differs based on how much control we have over it. We have the most control over process goals and the least control over outcome goals. The purpose of professional development is to improve knowledge and skills in order to facilitate individual, school-wide, and district-wide improvements for the purpose of increasing student achievement. Educators face continuously increasing requirements from federal and state mandates.

  • 1 answers

Tanish Shekhawat 5 years, 7 months ago

Its any country's territriol water area
  • 1 answers

Keshav Mutneja 5 years, 7 months ago

Latest bulletins refers to the latest update of Tricki's condition that Mrs.Pumphrey wanted
  • 1 answers

Yogita Ingle 5 years, 7 months ago

Development is the process where a particular organism not only grows physically but acquires mental and physiological growth as well.
The main differences between growth and development-

(1) Growth is change of physical aspects of the organism. Development is overall changes and progressive changes of the organism.

(2) Growth is cellular but development is organizational.

(3) Growth is the change in shape, form, structure, size of the body. Development is structural change and functional progress of the body.

(4) Growth stops at maturation but development continues till death of the organism.

(5) Development also includes growth. Growth is a part of development.

(6) Growth and development go side by side.

(7) Growth and development is the joint product of heredity and environment.

  • 2 answers

Joel Joji 5 years, 6 months ago

Guiseppe mazzini

Yogita Ingle 5 years, 7 months ago

Giuseppe Mazzini was an Italian revolutionary who founded two underground societies; first Young Italy in Marseilles and then Young Europe in Berne.

Giuseppe Mazzini was an important figure in liberal natioanlism. He made a significant contribution to the unification of Italy.

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Vikash Kumar 5 years, 6 months ago

Surdas bhaktikal ke the
  • 1 answers

Yogita Ingle 5 years, 7 months ago

P(x) = {tex}X^2 +5x+6+k=0{/tex}_(1)
Putting the value 1 in (1)equation.
P(1) = 1^2 +5*1+6+k=0
= 1+5+6+k =0
=6+6+k=0
12+k=0
K= - 12

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Parul Ailawadi 5 years, 6 months ago

It is a point where all the rays parallel to principal axis meets
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Joel Joji 5 years, 7 months ago

Thank you

Yogita Ingle 5 years, 7 months ago

<th>Subsistence Agriculture</th> <th>Commercial Farming</th>
• Subsistence agriculture is practised on small patches of land with the help of primitive tools like dao, hoe and digging sticks. • Commercial farming is done on large scale with the use of huge doses of modern inputs e.g. HYV seeds, chemical fertilizers, insecticides and pesticides.
• Farmer and Lis family produce cereals for themselves and for the local market. It is labour intensive where most of the activities are done by family/community labour. • Crops are grown with a view to export them to other countries. It is capital intensive where much of the work is done with the help of machines.
• It is practised in thickly populated areas. • It is practised in sparsely populated areas.
• Cereals like wheat, rice, millets are mainly raised. • Coffee, cotton, sugarcane etc are mainly raised.
  • 2 answers

Joel Joji 5 years, 7 months ago

Nastic movement is non directional movement and doesnot related to lts growth

Joel Joji 5 years, 7 months ago

Tropic movement is directional movement and related to its growth
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  • 3 answers

Dali Sahu 4 years, 6 months ago

Kyuki mansa roti nehi banati hai is lie usko roti banani Nahin aati
Kuki wo randi ha

Anshu Jakhar 5 years, 4 months ago

Ya to mansha abhi chhoti h ya fir use experience i mean trial ki jarurat h. ?

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