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otez555 [7]
3 years ago
14

What shows an atom correctly?

Chemistry
2 answers:
eduard3 years ago
8 0
It is the 2nd one because both Protons + Neutrons are in the nucleus.
castortr0y [4]3 years ago
5 0

Answer:

B

Explanation:

Atom consists of proton and neutron in center (often referred as nucleus) and electrons circling those things.

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Aluminium is a metal give reason​
trapecia [35]

Answer:

Aluminium is ordinarily classified as a metal. It is lustrous, malleable and ductile, and has high electrical and thermal conductivity. Like most metals, it has a close-packed crystalline structure and forms a cation in an aqueous solution.

7 0
3 years ago
Why do organisms need nitrogen?
RSB [31]
<span>All bulbs/plants and creatures </span>want nitrogen<span> to produce amino hallucinogen, proteid and DNA, although this </span>nitrogen<span> in the air is not in a manner that everybody can use.

For more information, look at the appendage below!</span>

6 0
3 years ago
Where is the earth curst thinkest
Dafna11 [192]
The crust of the Earth is thickest beneath the continents. 
6 0
3 years ago
It takes 412. KJ/mol to break a carbon-hydrogen single bond. Calculate the maximum wavelength of light for which a carbon-hydrog
olga_2 [115]

Answer:

The maximum wavelength of light for which a carbon-hydrogen single bond could be broken by absorbing a single photon = 290 nm

Explanation:

                  So to break a single C - H bond require = \frac{412}{6.023 X (10)^{23} }

                           = 6.84 x 10⁻¹⁹ joule

Find the wavelength of a photon we use E = hν

                                                             ⇒    E = \frac{hc}{Wavelength}

                   Where h = Planck's constant = 6.626 x 10⁻³⁴ J.K⁻¹.Mole⁻¹

                               c = speed of light = 3 x 10⁸ m/sec

                                                           Wavelength = \frac{6.626 X 10^{-34} X 3 X 10^{8} }{6.84 X10^{-19}  }

                                                                                 = 2.9 x 10⁻⁷ m

                                                                                 = 290 nm

                                           ∵ 1 nm = 10⁻⁹ m

                         

7 0
3 years ago
When copper ii chloride reacts with sodium nitrate copper ii nitrate and sodium chloride are formed?
Nesterboy [21]
The balanced chemical reaction would be written as follows:

CuCl2 + 2NaNO3 = Cu(NO3)2 + 2NaCl

This is an example of a double displacement type of reaction where the ions of the reactants displaces each other forming two new substances. Hope this answers the question.
5 0
3 years ago
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