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3 years ago

. An element has the electronic structure 2,8, 4. Which group is it in?

Chemistry

2 answers:

trapecia [35]3 years ago

8 0

Answer: None of the options

Explanation: 2, 8, 4 represents a total of 14 electrons.

The 2: 1s^2

The 8: 2s^2 2p^6

The 4: 3s^2 3p^2

Assuming a neutral atom, 14 electrons represnt element #14, Silicon. The electron configuration matches that of silicon, But silicon is in group 14, which is not in the options. It is a metalloid, so if there is another grouping system, use the nuimber assigned to the metalloids. But the word "Group"normally refers to the column number, 14 for silicon. And I've never heard of Group 0.

Rama09 [41]3 years ago

6 0

Answer:

Ans A

Explanation:

no. of shells determine the group

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What happens when sodium and sulfur combine

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How are carbon dioxide (CO2) levels in the atmosphere affected by tectonic uplift of rocks and their resultant chemical weatheri

valina [46]

Answer:

The levels of carbon dioxide (CO2) in the atmosphere are reduced

Explanation:

Tectonic uplift refers to the process by which the surface of the earth slowly rises either due to increasing upward force applied from the plates below the surface or decreasing downward force or weight of objects like melting glaciers acting from above. During uplift, land, as well as the sea floor rises forming mountains, plateaus and volcanic Islands.

During the process of weathering, carbon dioxide present in air combines with rainwater and forms carbonic acid. This acidic rainwater then falls on uplifted mountains and rocks weathering them in the process. Minerals present in the rock such as calcium, magnesium and sodium then combine with bicarbonate ions to form carbonates such as calcium carbonate, magnesium carbonate which are found in shells of living and dead organisms and also form rocks such as limestone. In this way, carbon dioxide is removed from the atmosphere.

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3 years ago

4) What mass of hydrogen is formed when 2.00g of magnesium<br> Mg + H2SO4–>H2SO4

DochEvi [55]

Answer:

0.16g

Explanation:

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In an organic structure, you can classify each of the carbons as follows: Primary carbon (1o) = carbon bonded to just 1 other ca

Alla [95]

The question is incomplete, complete question is :

In an organic structure, you can classify each of the carbons as follows: Primary carbon (1°) = carbon bonded to just 1 other carbon group Secondary carbon (2°) = carbon bonded to 2 other carbon groups Tertiary carbon (3°) = carbon bonded to 3 other carbon groups Quaternary carbon (4°) = carbon bonded to 4 other carbon groups How many carbons of each classification are in the structure below? How many total carbons are in the structure? How many primary carbons are in the structure? How many secondary carbons are in the structure? How many tertiary carbons are in the structure? How many quaternary carbons are in the structure?

Structure is given in an image?

Answer:

There are 10 carbon atoms in the given structures out of which 6 are 1° , 1 is 2° , 2 are 3° and 1 is 4°.

Explanation:

Total numbers of carbon = 10

Number of primary carbons that is carbon joined to just single carbon atom = 6

Number of secondary carbons that is carbon joined to two carbon atoms = 1

Number of tertiary carbons that is carbon joined to three carbon atoms = 2

Number of quartenary carbons that is carbon joined to four carbon atoms = 1

So, there are 10 carbon atoms in the given structures out of which 6 are 1° , 1 is 2° , 2 are 3° and 1 is 4°.

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3 years ago

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