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Wittaler [7]
3 years ago
7

The nucleus of an atom has all of the following characteristics EXCEPT that it

Chemistry
2 answers:
Nezavi [6.7K]3 years ago
6 0
The nucleus of an atom located at the center of the atom contains nearly all of the atoms mass. This has a positive charge because of the protons inside it. There are also neutrons with zero charge. Electrons are orbiting outside the atom. The answer to this problem is d. <span>contains nearly all of the atoms volume.</span>
kupik [55]3 years ago
6 0

Answer: d. contains nearly all of the atoms volume.

Explanation:

An atom is the smallest entity of a substance which consists of three subatomic particles called as neutrons, protons and electrons.

The most of the mass of the atom is concentrated in the centre of an atom and is called as nucleus. Protons and neutrons are collectively called as nucleons as they are present in the nucleus and contribute to the mass of the nucleus. Nucleus is very dense as it occupies very less space and most of the space in the atom is empty.

Protons carry positive charge and neutrons does not carry any charge. Thus the nucleus is positively charged.

Electrons carry negative charge and revolve around the nucleus in fixed energy paths called as orbitals.

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Cite two important quantum-mechanical concepts associated with the Bohr model of the atom.(b) Cite two important additional refi
Alenkinab [10]

Answer: Bohr postulated that electronic energy levels are quantized. Secondly, a photon of light of a particular frequency is emitted when electrons move from a higher to a lower energy levels.

Explanation:

The Bohr model of the atom is the immediate predecessor of the wave mechanical model of the atom. The wave mechanical model refined the Bohr's model by treating the electron as a wave having a wave function psi. The wave function describes the identity of the electron. From Heisenberg uncertainty principle, the position of a particle cannot be accurately and precisely measured. Hence the wave mechanical model added that electrons are not localized in orbits according to Bohr's model but the integral of psi squared dx gives the probability of finding the electron within a given space.

8 0
3 years ago
Read 2 more answers
A decay series starts with the synthetic isotope ²³⁹₉₂U. The first four steps are emissions of a β⁻ particle, another β⁻, an a p
VladimirAG [237]

<u>Thorium series</u> could start by this sequence.

<h3>Brief explanation</h3>

To write balanced equations for nuclear decay processes. It's important to remember that the mass number and the atomic numbers must be balanced. And so what that means is that if we look at an elements nuclear symbol, the atomic number is the bottom number and the top number, the superscript, is the mass number, and so when we add them up on both sides, they have to be equal. There are two different ways in which decay can occur.

In this, series one is through beta decay, which means that the following particle is produced. The other is Alpha Decay, which produces this particle. Both are products. So if we start off with uranium to 39 you read it in nuclear notation, which means we have to find the atomic number just 92 and it undergoes beta decay.

So that means that it produces this particle find the second particle we used the atomic number, so 92 equals minus one plus x, where X equals 93 which is Neptune IAM. The mass number of our new isotope is zero plus X equals to 39 where X equals to 39. This product becomes the reactant in my next decay, which is also a beta decay. And to find the unknown element we do the same here.

Except for that it's 93 equals minus one plus x, where X is 94 which is P u plutonium, and the mass number is zero plus X equals to 39 or to 39. The next decay starts with the isotope that we just form to 39 p. U. This time it's an Alpha decay. So we produce this particle to find the unknown. Element 94 equals two plus x, where X equals 92 which takes us back to uranium.

Find the mass number of this isotope 2 39 equals four plus X, where X equals to 35. Finally, for the last decay, you have another Alpha decay starting with uranium to 35 making an alpha particle. The atomic number will be 90 which is T H and the top is 2 31 For the mass number. This begins the natural decay, series of thorium .

Learn more about chemical decay

brainly.com/question/1898040

#SPJ4

7 0
1 year ago
2 QUESTIONS: ANSWER THIS with a proper answer plz. PLZ DO NOT ANSWER JUST FOR MY BRAINLY POINTS!!!!
leonid [27]

Answer:

Si hay algo que sucedió entre ustedes raro o un comportamiento que tuviste con esa persona o que te vio hacer asi como le pudieron decir algo de ti que no le gustara a tu amigo hace que se comporte raro contigo

Explanation:

3 0
3 years ago
Which word equation represents a neutralization reaction
Vlad1618 [11]
Base+salt > acid +alkali > neutralization i think this is the reaction
8 0
3 years ago
Read 2 more answers
enny places a strip of pH paper into a solution. When she removes the pH paper, it has turned yellow-green. What should Jenny do
Svetllana [295]
Compare it to the chart showing how base or acidic a substance is
8 0
4 years ago
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