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mixas84 [53]
2 years ago
13

Which characteristic do valence electrons indicate about reactions between atoms?

Chemistry
1 answer:
Setler [38]2 years ago
6 0

Bond number

The characteristic of reactions that depends on valence electrons is the bond type.

In chemistry, a chemical bond could be;

Ionic

Covalent

The type of bond formed depends on the number of valence electrons present. When there are few valence electrons on an atom, it mostly forms ionic bonds.

When there are more electrons on an atoms, it mostly forms covalent bonds and the electrons between the atoms are shared.

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238,2U --&gt; 234Th +<br> 90
stiv31 [10]

Answer:

\\_{2}^{4} \alpha

Explanation:

In this question, we wish to find the missing nuclei for the equation:

\\_{92}^{238} U\rightarrow _{90}^{234} Th + _{Z}^{A} X

In order to find the missing species, we need to use the charge and mass balance law. That is, the mass should be conserved: the total mass on the left-hand side with respect to the arrow should be equal to the total mass on the right-hand side with respect to the arrow:

238 = 234 + A

Notice from here that:

A = 238 - 234 = 4

So far we know that the mass of X is 4. Similarly, we apply the law of charge conservation. The total charge should be conserved:

92=90+Z

From here:

Z = 92-90=2

We have a particle:

\\_{2}^{4} X

Looking at the periodic table, an atom with Z = 2 corresponds to helium. This can also be written as an alpha particle:

\\_{2}^{4} \alpha

5 0
3 years ago
How does a parallel circuit differ from a series circuit?
victus00 [196]

I believe it is B.  A series circuit has one path for electrons, but a parallel circuit has more then one path.

Could I Have brainliest?

6 0
3 years ago
Read 2 more answers
When you calculate apercent recovery you may find sometimes that it islarger than 100%. Assuming this is NOT due to errors assoc
Romashka-Z-Leto [24]

Answer:

Presence of impurities in the product.

Explanation:

Laboratory experience has shown that the percent yield obtained from a reaction may be greater than 100% if the product obtained from the reaction contains impurities that causes its mass to be greater than it actually would be if the product was pure.

A typical impurity that may be present in a product is the solvent used. This can be removed by evaporation of the solvent or by washing the product thoroughly.

Reaction of solid products with gases may also increase the percentage yield above 100%.

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3 years ago
The first movement of Vivaldi's "spring" has recurring theme called
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Growth of human perception and of human spirit
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It's D I think. when experimental results do not support the original hypothesis
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