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2 years ago

Which element does the electron configuration 1s2 2s2 2p2 represent B C N K

Chemistry

2 answers:

Stella [2.4K]2 years ago

3 0

C 1s²2s²2p²
carbon
__________________________

liberstina [14]2 years ago

3 0

Answer: The given configuration represents carbon atom.

Explanation:

Electronic configuration tells us about the number of electrons that are present in an atom. It also determines the atomic number of an element.

For the given electronic configuration = $1s^22s^22p^2$

Total number of electrons = 2 + 2 + 2 = 6

The element which has atomic number '6' is carbon atom.

Hence, the given configuration represents carbon atom.

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lilavasa [31]

Answer:

$m_{Fe}=12.6gFe$

Explanation:

Hello,

In this case, since we have grams of iron (III) oxide whose molar mass is 159.69 g/mol are able to compute the produced grams of iron by using its atomic mass that is 55.845 g/mol and their 2:4 molar ratio in the chemical reaction:

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2 years ago

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andrey2020 [161]

The model would look something like the image below.

There would be a central nucleus containing 20 protons and 20 neutrons.

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8 0

2 years ago

Which equation shows the proper setup to find the volume of a 0.250 M CaCl2 solution that contains 39.5 g of CaCl2?

Jlenok [28]

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Phoenix [80]

A pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers.

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2 years ago

Drinking water may contain a low concentration of lead ion (Pb2 ) due to corrosion of old lead pipes. The EPA has determined tha

Lynna [10]

Answer:

3.861x10⁻⁹ mol Pb⁺²

Explanation:

We can define ppm as mg of Pb²⁺ per liter of water.

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2 years ago