What is the nuclear equation for the alpha decay of 173 Yb?

Answers

Answer 1

Answer: Yb 173 turns into Er 169 after alpha decay. you can find that by knowing an alpha particle is basically a helium nucleus with 2 protons and 2 neutrons. That means that Yt 173 loses 2 protons and 2 neutrons when undergoing alpha decay.

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Highlight the basic points in Lewis and Langmuir theory of electrovalency

Answers

The correct answer for the question that is being presented above is this one: "Electrovalency is characterized with the transferring of one or more electrons from one atom to another together with the formation of ions and as well as the number of positive and negative charges.

The Lewis and Langmuir theory of electrovalency (and as well as Kossel's) is dealing with Ionic bonds.

Lewis: electron-pair sharing, octet rule, Lewis Symbols or StructureLangmuir: introduced term "covalent" bond, and popularized Lewis's ideas

The Lewis-Langmuir electron-pair or covalent bond is referred as the homopolar bond, where the complete transfer of electrons give rise to ionic, or electrovalent bond (1) through attraction of opposite charges.

How/why do copy machines produce o zone?

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It's saying that it "protects us from the ozone layer." but too much may be harmful to your body because we aren't used to that

Which of the following substances best conducts electricity in an aqueous solution?a. H2O b. NH3 c. CH3OH d. CaCl2

Answers

The correct option is D.

Substances that can conduct electricity in aqueous solutions are called electrolytes. Calcium chloride is an example of an electrolyte. Ionic compounds are usually good electrolytes, this is because they contain mobile ions, which can carry electricity round an electrical circuit. Both positive and negative ions are present in electrolytes; the positive ions comes from the metals while the negative ions comes from the non metals. These ions are able to move about when the compound is in the molten form or in aqueous solution.

The correct answer is definitely D. CaCl2
H2O can't be a productor just by itself as it need electrolytes.
CH3OH is non-polar one, so throw it.
You need something form ionic compound range, so the last one is the only suitable answer.

Which 1-mole sample has the least entropy?(1) Br2(s) at 266 K (3) Br2(l) at 332 K
(2) Br2(l) at 266 K (4) Br2(g) at 332 K

Answers

The correct answer is option 1. Entropy is the degree of disorderliness in a system. Among the phases, solid has the most ordered structure. Also, at lower temperatures the molecules will have less kinetic energy therefore less motion. Thus, bromine in solid form at 266K has the least entropy.

Which elements are included in Group 5A?

Answers

Answer : The elements include in group 5A are, Nitrogen, phosphorous, arsenic, antimony and bismuth.

Explanation :

According to the modern periodic table, the group 5A is known as group 15. And it is also known as nitrogen family.

The elements present in group 5A are, nitrogen (N), phosphorous (P), arsenic(As), antimony(Sb) and bismuth (Bi).

The general electronic configuration of group 5A elements is, $ns^2np^3$

The number of valance electrons present in group 5A elements are, 5

Hence, the elements include in group 5A are, Nitrogen, phosphorous, arsenic, antimony and bismuth.

Final answer:

Group 5A, also called Group 15 in the modern IUPAC system, contains the elements Nitrogen, Phosphorus, Arsenic, Antimony, Bismuth, and the synthetic element Moscovium. Each of these elements has a p3 configuration in their valence shell.

Explanation:

The elements present in Group 5A (Group 15 in IUPAC system) are known as the pnictogens. This group includes Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb), Bismuth (Bi) and the unconfirmed synthetic element Moscovium (Mc). These elements, each with a p3 configuration in their valence shell, form compounds with a wide range of properties and uses.

Nitrogen is a common gas in the Earth's atmosphere, deeply involved in biological processes. Phosphorus is key in DNA and energy processes in living beings. Arsenic, Antimony, and Bismuth are metalloids used in various industrial applications. Moscovium is a synthetic element not found naturally and its properties are being studied.

Learn more about Group 5A Elements here:

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Increasing the intensity and duration of an exercise program too quickly can lead to injury.a. True
b. False

Answers

It is true that a sudden increase in both intensity and duration of physical exercise can result in injury. The body needs time to process any changes. Muscles need to build strength and flexibility gradually and the joints need time to acclimate to changes in pressure.

this is a true statement

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