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3 years ago

Which of the following is true statement about isotopes?

2 answers:

7 0

<span>Notice for the Carbon question they were the same element and the shared the same number of protons. so i think d. is the answer</span>

Ket [755]3 years ago

7 0

Answer:

D. different isotopes for the same element will always have the same numbers of neutrons.

Explanation:

An isotope is the different variant of an element that has different number of neutron. There are various elements found in nature that have different isotopes.

Number of neutrons present in atom is different for the same element which makes the mass of one isotope different from the another.

Example of such isotope : Isotope of hydrogen are Protium, Deuterium and Tritium.

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3 years ago

When a potential difference of 2 V is applied across the ends of a wire of 5 m length, a current of 1 A is found to flow through

PtichkaEL [24]

1) The total resistance of the wire can be found by using Ohm's law:
$V=IR$
where V is the potential difference, I is the current and R is the resistance. By rearranging the equation, we find
$R= \frac{V}{I}= \frac{2 V}{1 A}=2 \Omega$
This is the total resistance of the wire. If we want to find the resistance per unit length, we must divide this number by the length of the wire, and we get:
$\frac{R}{L}= \frac{2 \Omega}{5 m}= 0.4 \Omega/m$

2) To find the resistance of a piece of wire of L'=2 m, we should multiply the resistance per unit length by the length of this piece of wire:
$R= \frac{R}{L}L'=(2 \Omega/m)(2 m)=4 \Omega$

3) If the length of the wire is doubled:
$L=2 \cdot 5 m=10 m$
The total resistance of the wire will be the resistance per unit length times the new length of the wire:
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3 0

3 years ago

How does the wave model of electrons orbiting the nucleus account for discrete energy values?

o-na [289]

Explanation:

When treating the electron as a wave, the concept of electrons orbiting the nucleus allows for the distinct energy levels.The diameter of electron orbits matches the orbit radii which also discrete the energy levels.

The small number of deflected particles were repelled from powerful heavy positively charged central cores which is known as the atomic nucleus.

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3 years ago

If charge is destroyed, it is a violation of the law of conservation of

Reil [10]

This is a violation of the law of conservation of charge.
This law states that the total charge in a given system must remain constant, and charge can neither be created nor destroyed. In calculating the net charge present; however, the signs of the charge (positive and negative) are accounted for. Proof for this law was provided by Micheal Faraday in 1843.

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3 years ago