Answer:In the given molecule the methyl group is attached at the second carbon atom of the parent chain. Therefore the name of hydrocarbon is 2-methylbutane.
Explanation:
The balance of forces allows to find the result for the question if the isotope of boron 9.99 una is stable:
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The boron isotope of mass 9.99 uma is unstable because the repulsive force increases.
The stability of atomic nuclei depends on the balance the force is electrostatic repulsion between the protons and the strong interaction of attraction.
One way to achieve this balance is to increase the separation of the protons with uncharged particles between them, the neutral ones, the strong interaction is of the same magnitude for protons and neutrons, therefore the repulsion is decreased and the strong attraction interaction is maintained. .
In the case of Boron, which has 5 protons, the stable structures have more atomistic 10 and 11 una, which is why it has 5 and 6 neutrons each. Therefore each proton has a neutrons next to it and in the other case a proton at the end has two neutrons, this causes the distance between the protons to increase, decreasing the electrostatic repulsion.
It indicates that we have a Boron nucleus of mass 9.999. The number of protons must remain fixed, therefore there are only 4 neutrons.
Consequently, some of the protons does not have a neutron next to it and can approach the other proton, therefore the electrostatic repulsion increases and the stability of the atom decreases.
In conclusion, using the balance of Forces we can find the result for the question if the isotope of boron 9.99 una is stable:
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The boron isotope of mass 9.99 amu is unstable because the repulsive force increases.
Learn more about nuclear stability here: brainly.com/question/897383
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Electrons are orbiting the nucleus in the fxed way paths located in solid sphere
