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Ratling [72]
3 years ago
11

Do you think that scientists should continue to try to create super-heavy elements and expand the periodic table? Explain why or

why not.
Chemistry
2 answers:
Burka [1]3 years ago
4 0

Answer:

All scientific research helps to generate new knowledge and improve the understanding of what is currently known, so it is important to support all scientific progress as long as it is developed in safe conditions and with the aim of increasing the knowledge of the world that we surrounds and of the universe.

Explanation:

The super-heavy elements are a group of elements of the periodic table that have very large and therefore very heavy nuclei, because of this they are very unstable (sometimes they are only stable less than a second and then they decompose into other atoms more stable) and that is why they have not been discovered so far in nature.

Super-heavy elements are studied in special laboratories as they are created when other atoms of smaller nuclei are "stuck" through a shock that requires a lot of energy. This clash that a new element can generate is achieved after millions of tests are carried out, and in each attempt a lot of information is generated that must be analyzed by super computers in order to determinate whether that attempt was successful (created a new element) or not.

That is why it takes a long time to study and develop new elements, but during this time and through the tests we get very important information that allows us to better understand the behavior of atoms and ratify or assume new theories that advance in the scientific community which may not currently be applicable but in the future.  

Thanks to the past investigations of scientist along the history they discovered all the elements of the current periodic table that allows us to undestand the properties of atoms and their uses for a huge amount of applications.

BaLLatris [955]3 years ago
3 0
But the hunt for new elements started with efforts to develop nuclear power and the atomic bomb during World War II. At the time, uranium was the heaviest known element, sitting at number 92 in the periodic table.

Researchers quickly discovered that when uranium is placed in a nuclear reactor, a complex sequence of interactions leads to the production of several so-called transuranic elements (elements beyond uranium).

Probing around in the debris of the first hydrogen bomb test revealed two further transuranic elements, einsteinium and fermium, bringing the total to an even
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In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.

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Which of the following has the smallest atomic radius: Mg2+, Mg, Ca2+, or Ca?
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The appropriate response is Mg2+. It has the smallest radius the would mean the littlest separation from it's the furthest shell to the core 
Since magnesium has one less shell that calcium, Mg would have a little nuclear range. Besides, a particle of a component will have a little nuclear sweep than it's molecule be utilized as a part of its particle frame it has lost a shell
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How many of sodium (Na) are needed to make 4.5 liters of a 1.5mol/L of Na solution?​
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2 years ago
Which of the following processes are exothermic?Which of the following processes are exothermic?Br(g) + e- → Br-(g)Li(s) → Li(g)
Ksenya-84 [330]

Answer:

The correct answer is:  None of the above are exothermic.

Explanation:

Energy is the ability to perform a job or to produce heat. Chemical reactions involve a rearrangement of atoms between substances with rupture or formation of chemical bonds and this generates changes in the energy of the system.

An exothermic reaction is that reaction where heat is released. This means that the energy of the molecules of the products is less than the energy of the molecules of the reactants.

An endothermic reaction is that chemical reaction that, when it occurs, consumes energy, that is, the products obtained have greater energy than the initial reagents, since they have taken part of the heat of the environment.

Sublimation is the change of state of a substance from solid to gas directly without going through the liquid state. This process requires energy to be carried out because the strong attractive energies between the solid molecules must be broken. So it is an endothermic process. This is what happens in the following reactions:

Li(s) → Li(g)

NaF(s) → Na+(g) + F-(g)

Dissociation is a process in which complexes, molecules or salts are separated into smaller molecules, ions or radicals, usually reversibly. Within the dissociation is the homolytic rupture, where each atom separates and carries the same charge of electrons. Thus free radicals are formed. To dissociate or break these bonds requires energy, so it is endothermic. This type of reaction occurs in:

Cl2(g) → 2Cl(g)

Electronic affinity is defined as the energy exchanged when an isolated and fundamental state gaseous atom takes an electron to form an anion (negative ion).  When the electronic affinity is greater than zero, the process would be endothermic and when the electroaffinity is less than zero, the process would be exothermic.

This occurs in:

Br(g) + e- → Br-(g)

The highest electronic affinities are for the elements of group 17 of the periodic table, the group to which bromine belongs. This means that the electronic affinity is greater than zero and is endothermic.

<u><em>The correct answer is:  None of the above are exothermic.</em></u>

<u><em>Br(g) + e- → Br-(g) </em></u>

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