Which list includes elements with the most similar chemical properties? 1.Br, Ga, Hg 2. Cr, Pb, Xe 3. O, S, Se 4. N, O, F
Answers
The list which includes elements with the most similar chemical properties is; Choice 3: O, S, Se
First, we must know:
Elements are arranged in 7 Periods and 18 groups in the periodic table.
Additionally, Elements in the same group of the periodic table often have similar chemical characteristics as a result of equal number of Valence electrons.
By considering Choices individually;
For Choice 1: (Br, Ga and Hg)
- Bromine is a member of Group 17, Gallium is a member of Group 13 and Mercury is a member of Group 12.
- Bromine is a member of Group 17, Gallium is a member of Group 13 and Mercury is a member of Group 12.All three elements belong to different groups. In essence, they do not show similar chemical properties.
For Choice 2: (Cr, Pb and Xe)
- The elements belong to different groups of the periodic table and consequently, they do not show similar chemical properties.
For Choice 3: (O, S and Se)
- Oxygen, Sulfur and Selenium are all members of Group 16(6)
- Since, all three elements belong to same group. In essence, they will show similar chemical properties.
For choice 4: (N, O and F)
- The elements belong to different groups of the periodic table and consequently, they do not show similar chemical properties.
Ultimately, the correct answer is Choice 3.
Read more:
Answer: The correct answer is Option 3.
Explanation:
Elements are distributed in 7 Periods and 18 groups in a periodic table.
Elements which belong to same group show similar chemical properties because of the same number of valence electrons.
For the given options:
Option 1: Br, Ga and Hg
Bromine is present in Group 17, Gallium is present in 13 and Mercury is present in Group 12.
As, all the three elements belong to different groups. So, they do not show similar chemical properties.
- Option 2: Cr, Pb and Xe
Chromium is present in Group 6, Lead is present in Group 14 and Xenon is present in Group 18.
As, all the three elements belong to different groups. So, they do not show similar chemical properties.
- Option 3: O, S and Se
Oxygen, Sulfur and Selenium are present in Group 16.
As, all the three elements belong to same group. So, they will show similar chemical properties.
- Option 4: N, O and F
Nitrogen is present in Group 15, Oxygen is present in Group 16 and Fluorine is preset in Group 17.
As, all the three elements belong to different groups. So, they do not show similar chemical properties.
Hence, the correct answer is Option 3.
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Answers
Neutron capture reactions.
Explanation
Isotopes of the same element have the same number of protons in each nucleus. However, their nucleus differ in the number of neutrons. Adding one or more neutrons to a nucleus will converts it to a different isotope of the same element.
Neutrons can be produced with a particle accelerator. The researcher might aim fast moving alpha particles from the accelerator at a beryllium Be target.
Doing so will convert beryllium-9 to carbon-12 and release one neutron.
The neutron produced in this process moves very fast ("fast neutrons"). It might knock protons or alpha particles off the target nucleus. This is undesirable since the nucleus will have a change in its proton number. It will end up belonging to a different element.
The researcher should reduce the speed of those neutrons. Passing neutrons through moderators greatly reduces their speed. Moderators are materials that are rich in light nuclei. They remove the energy of neutrons as the two collide. Examples of moderators are heavy water (D₂O) and graphite (carbon). Slow neutrons are easier to capture than fast-moving ones. Combining those slow-moving neutrons to the source isotope will likely produce a different isotope of the same element.
Reference
Vitz, Ed. et. al, "19.5: Neutron Bombardment", ChemPRIME (Moore et al.), Libretexts Chemistry, 2017
Answer:
D. BY ADDING OR REMOVING NEUTRONS.
Hope this helps!
Explanation:
Answers
Answer:
Exergonic process
Explanation:
A reaction in which the change in free energy is negative is what is termed an exergonic reaction. Energy is released into the surrounding medium in this type of reaction.
When pellets of NaoH is dissolved in water, energy in the form of heat is released into the medium and the solution gets hot.
Hence, the dissolution of NaoH in water is said to be exergonic.
Answers
Answer:
the word circuit means go around therefore a circuit is a closed path around which electricity or water flows
Explanation:
Help this was helpful
A)2.63x10^6 B)0.0000026
Answers
Answer:
use Google this will help you alot and also use chegg
a. ethanol.
b. gasoline.
c. opiates.
Answers
Answer:
Alcohol contains A. ethanol.
Explanation:
Alcohol beverages are drinks that contain more than a minimal amount of ethyl alcohol or ethanol. Ethanol is a chemical compound, considered the main type of alcohol. It is produced by grain fermentation and used as a solvent, as an additive to gasoline and as the intoxicating ingredient of beer, wine, distilled spirits and other beverages.
Answers
Answer:
the net ionic equation is H+(aq) + OH-(aq)----->H2O(l)
Explanation:
In conclusion to the earlier solution, 2H+(aq) + 2OH-(aq)----->2H2O(l) can be broken down because they all have the same coefficient. So divide both sides by 2.
The net ionic equation will be H+(aq) + OH-(aq)----->H2O(l)
Final answer:
The balanced molecular equation for the neutralization reaction between Hydrochloric acid (HCl) and Strontium hydroxide (Sr(OH)2) is HCl(aq) + Sr(OH)2(aq) -> SrCl2(aq) + 2H2O(l). Its net ionic equation is 2H+(aq) + 2OH-(aq) -> 2H2O(l). Spectator ions are eliminated during the formulation of the net ionic equation.
Explanation:
A neutralization reaction between hydrochloric acid and strontium hydroxide can be represented by the balanced molecular equation: HCl(aq) + Sr(OH)2(aq) -> SrCl2(aq) + 2H2O(l). Breaking it down into the total ionic equation we will have: H+(aq) + Cl-(aq) + Sr2+(aq) + 2OH-(aq) -> Sr2+(aq) + 2Cl-(aq) + 2H2O(l). This can be simplified by removing the spectator ions to obtain the net ionic equation: 2H+(aq) + 2OH-(aq) -> 2H2O(l). This aligns with the principle that in a neutralization reaction, an acid reacts with a base to form water and a salt.
Learn more about Neutralization Reaction here:
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