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3 years ago

How many protons, electrons, and neutrons does the following Isotope contain? 27Al 3+

Chemistry

1 answer:

Rufina [12.5K]3 years ago

6 0

Answer:

13 protons, 10 electrons, 14 neutrons

Explanation:

First, Al is having a charge of +3, and this means Al has lost 3 of its valence electrons.

Neutral atom of Al has atomic number of 13, but this isn't an atom. This is an ion which has lost 3 electrons, therefore the number of electrons becomes 10 while the number of protons remains 13.

We get the number of neutrons by subtracting the number of protons from the mass number. In this case, the mass number is 27 and proton number is 13. If you take away 13 from 27, you are left with 14. This is the number of neutrons.

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An isotope of an element, atomic number Z, has a mass number 2z+4. How many neutrons are there in the nucleus of the element?

Svet_ta [14]

Answer:

z+4

Explanation:

An isotope of an element, atomic number Z, has a mass number 2z+4. How many neutrons are there in the nucleus of the element?o

protons + neutrons =mass number

z +neutrons = 2z+4

neutrons = 2z+4 - z=z+4 which is the # of neutrons in the nucle

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3 years ago

Which equation shows how wavelength is related to velocity and frequency?

Nataly_w [17]

Answer:

The correct option is the option;

$\lambda = \dfrac{v}{f}$

Explanation:

The wavelength of a wave is the distance between two successive crests of the wave

Therefore, the wavelength, λ, is given by the fraction of the velocity, <em>v</em>, of the wave divided by the frequency, <em>f</em>, (the number of cycles that pass through a point) of the wave

Mathematically, we have;

$The \ wavelength, \ \lambda = \dfrac{The \ wave \ velocity, \ v}{The \ wave \ frequency, \ f}$

$\lambda = \dfrac{v}{f}$

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3 years ago

Atoms are indivisible spheres.

miskamm [114]

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3 years ago

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2. The ions in an ionic compound separate from each other when

kkurt [141]

Answer:

A. when dissolved in water

Explanation:

Water is an extremely polar molecule, meaning it has a positive end a negative end. When an ionic compound is dissolved, the positive pole of water will be attracted to the negative ion and attach itself to it. The same goes for the positive ions. That's how water breaks down ionic compounds

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3 years ago

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The density of water is 1.00g/cm3. Express this density in lb/m3

Ira Lisetskai [31]

Answer: 2205 lb/m^3

Explanation:

1g = 0.002205lb
1cm^3 = 1x10^-6m^3

Convert: (1g/cm^3)*(0.002205lb/g)*(1cm^3/1x10^-6m^3) = 2205 lb/m^3

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3 years ago