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Posted by Mohd Salauddin 5 years, 11 months ago
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Posted by Mohd Salauddin 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
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Properties |
Alkaline earth metals |
Alkali metals |
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1. |
Physical properties |
Comparatively harder. High melting points. Diamagnetic. |
Soft, low melting points paramagnetic. |
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2. |
Valency |
Bivalent |
Monovalent |
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3. |
Electropositive nature |
Less electropositive |
More electropositive |
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4. |
Hydroxides |
Weak bases, less soluble and decompose on heating. |
Strong bases, highly soluble and stable towards heat. |
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5. |
Bicarbonates |
These are not known in free state. Exist only in solution. |
These are known in solid state. |
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6. |
Carbonates |
Insoluble in water. Decompose on heating. |
Soluble in water. Do not decompose on heating (LiCO3 is an exception) |
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7. |
Action of carbon |
Directly combine with carbon and form carbides |
Do not directly combine with carbon |
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8. |
Solubility of salts |
Sulphates, phosphates fluorides, chromates, oxalates etc are insoluble in water |
Sulphates, phosphates, fluorides, chromates, oxides etc are soluble in water. |
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9. |
Reducing power |
Weaker as ionization potential values are high and oxidation potential values are low. |
Stronger as ionization potential values are low and oxidation potential values are high |
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10. |
Electronic configuration |
Two electrons are present in the valency shall. The configuration is ns2 (bivalent) |
One electron is present in the valency shell. The configuration is ns1 (monovalent) more electropositive |
Posted by Joginder Singh 5 years, 11 months ago
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Posted by Rishi Tomar 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Univariate Frequency Distribution
- When data is classified on the basis of single variable, the distribution is known as univariate frequency distribution.
- It aims to make description about the particular variable.
- It is also known as one-way frequency distribution.
- Ex : Height of students in a class.
Bivariate Frequency Distribution :
- When the data is classified on the basis of two variables, the distribution is known as bivariate frequency distribution.
- It aims to determine the empirical relationship between the two variables.
- It is also known as two-way frequency distribution.
- Ex : Height and weight of students in a class.
Posted by Prahlad Vishwakarma 5 years, 11 months ago
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Posted by Happy Ror 5 years, 11 months ago
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Meghna Thapar 5 years, 6 months ago
Protozoa are small (but not simple) organisms. They are single-celled heterotrophic eukaryotes, which eat bacteria and other food sources. It is an old term, and the wider term protist is generally preferred today.
These are divided into four major groups.
(1) Amoeboid protozoans or sarcodines. They are unicellular, jelly-like protozoa found in fresh or sea water and in moist soil. ...
(2) Flagellated protozoans or zooflagellates. ...
(3) Ciliated protozoans or ciliates. ...
(4) Sporozoans.
Posted by Kantina Manlong 5 years, 11 months ago
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Aayu... A?V 5 years, 11 months ago
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Posted by Komal Shabi 5 years, 11 months ago
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Posted by Tanya Saxena 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
using Pascal law
A₂=5A₁
F₂=80 ×9.8
F₁ / A₁ =F₂ /A₂
F₁= 8 ×98 / 5
F₁=156.8 N
Posted by Chungkit Lepcha 5 years, 11 months ago
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Meghna Thapar 5 years, 6 months ago
Polyunsaturated fats can help lower your LDL (bad) cholesterol. Cholesterol is a soft, waxy substance that can cause clogged or blocked arteries (blood vessels). Having low LDL cholesterol reduces your risk for heart disease.
Polyunsaturated fats include omega-3 and omega-6 fats. These are essential fatty acids that the body needs for brain function and cell growth. Our bodies DO NOT make essential fatty acids, so you can only get them from food.
Omega-3 fatty acids are good for your heart in several ways. They help:
- Reduce triglycerides, a type of fat in your blood
- Reduce the risk of developing an irregulat heartbeat (arrhythmia).
- Slow the buildup of plaque in your arteries
- Slightly lower your blood pressure
Posted by Aayu... A?V 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
The metals of group 7, 8, and 9 do not form hydrides. This region is referred as Hydride gap in modern periodic table. These metals have low affinity for hydrogen in their normal oxidation state.
For eg.- Mn, Fe, Co, Rh, Hf, W, Os etc
Posted by Anish Saha 5 years, 11 months ago
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Posted by Jyoti Pal 5 years, 11 months ago
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Savita Singla 5 years, 11 months ago
0Thank You