Answer:
Applied science is generally engineering, which develops technology, although there might be dialogue between basic science and applied science (research and development). Medical sciences such as medical microbiology are examples of applied sciences.
Explanation:
B. calcium
C. rhodium
D. chlorine
Answer:
Calcium
Explanation:
Calcium is needed in our body to make bones (skeletal system) and teeth strong. Apart from making bones and teeth strong, it is required in other body functions such as:
Enabling blood to clot
Helping in muscle contraction
Helping heart muscle in maintaining normal heart beat
About 99% of calcium present in the body is stored in bones. Calcium is stored in bones in the form of calcium phosphate.
Bones continuously replace old calcium with new one. Calcium is not produced in our body. It comes from daily diet, therefore, it essential to take calcium rich diet.
a. True
b. False
Acid precipitation is caused by the release of pollutants such as sulfur dioxide and nitrogen oxides when fossil fuels are burned. These pollutants combine with water in the atmosphere to form acids, which can fall to the earth as precipitation.
The statement in the question is True. Acid precipitation can indeed be traced back to the burning of fossil fuels. When we burn fossil fuels like coal, oil, and gas, they release pollutants into the atmosphere. These pollutants include sulfur dioxide and nitrogen oxides, which can combine with water in the atmosphere to form sulfuric acid and nitric acid. These acids can fall to the earth in the form of precipitation, such as rain, snow, or fog, hence the term 'acid precipitation'. This process can have harmful impacts on the environment, including pollution of bodies of water and damage to vegetation.
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Answer:
Chloride ion
Explanation:
The anion present in the unknown solution would be chloride ions.
A white precipitate of silver chloride is usually formed when drops of silver nitrate are added to a solution containing chloride ions. The ionic equation is as below:
1. Cl1−
2. Co4+
3. Fe2+
4. V
5. Sc2−
Answer: Option (3) is the correct answer.
Explanation:
When there is a negative charge on an atom then we add the charge with the number of electrons. Whereas when there is a positive charge on an atom then we subtract the charge from the number of electrons.
Atomic number of chlorine is 17. So, number of electrons present in is 17 + 1 = 18 electrons.
Atomic number of cobalt is 27. So, number of electrons present in is 27 - 4 = 23 electrons.
Atomic number of iron is 26. So, number of electrons present in is 26 - 2 = 24 electrons.
Atomic number of vanadium is 23. So, number of electrons present in V is 23 electrons.
Atomic number of scandium is 21. So, number of electrons present in is 21 + 2 = 23 electrons.
Thus, we can conclude that out of the given species, has the greatest number of electrons.
Among the given species, has the greatest number of electrons.
Further Explanation:
The arrangement of electrons in various shells and sub-shells of an atom is called electronic distribution. The electron filling is done by keeping following rules and principles in mind:
(i). Aufbau principle
According to this, electron filling takes place in orbitals in the increasing order of their respective energies. The energy order of orbitals is as follows:
(ii) Hund’s rule
No electron will b epaired until each orbital is singly occupied.
(iii) Pauli’s exclusion principle
It states that two electrons can never have all the four quantum numbers same. The value of spin quantum number for both electrons must b edifferent.
1. According to the periodic table, the atomic number of Cl is 17 so its electronic configuration is . It gains an electron to form ion and its configuration becomes . So it has a total of 18 electrons.
2. According to the periodic table, the atomic number of Co is 27 so its electronic configuration is . It loses four electrons, two 4s electrons and two 3d electrons to form ion and its configuration becomes . So it has a total of 23 electrons.
3. According to the periodic table, the atomic number of Fe is 26 so its electronic configuration is . It loses two 4s electrons to form ion and its configuration becomes . So it has a total of 24 electrons.
4. According to the periodic table, the atomic number of V is 23 so its electronic configuration is . So it has a total of 23 electrons.
5. According to the periodic table, the atomic number of Sc is 21 so its electronic configuration is . It gains two electrons to form ion and its configuration becomes . So it has a total of 23 electrons.
Therefore, the maximum number of electrons is present in (24).
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Answer details:
Grade: High School
Chapter: Electronic configuration of the elements
Subject: Chemistry
Keywords: electrons, Cl-, Co4+, Fe2+, V, Sc2-, 17, 27, 26, 21, 23, electronic configuration.
Answer: currency
Explanation:
Answer:
1.
Explanation: