What type of organic molecules are enzymes?

The answer is (A) The transfer of electrons forms strong bonds between ions.

The tendency  of an element  to react  is closely  related to  the number  of valence   electrons in atoms of the element (answer  C).

   Explanation

Valence  electrons  are outer  shell  electrons  of an atom.They govern the bonding   behavior  of  an element.

 when element react  to form compound, valence  electron  are involved.

Valence electrons  are involved in a reaction either by sharing  among   atoms or may be  transferred  from one  atom  to another.

For example in  formation  of NaCl bond there  is transfer of  valence electron between  Na  and Cl. Na  donate 1 valence electron  while Cl accept 1 electron to form NaCl

The scientists use one of their five senses to gather information, they are making an observation.

What is an observation ?

The active gathering of data from a primary source is observation. Observation of living things makes use of the senses. Using scientific tools to perceive and record data is another way that observation may be used in science.

A technique for gathering information through observation of individuals, situations, or physical qualities as they are occurring naturally.

Using one or more senses, our observational abilities provide us with knowledge about things, occasions, attitudes, and occurrences. Being able to see and learn about the outside world is crucial because it forms the basis of effective communication.

Thus, option A is correct.

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Final answer:

In scientific endeavors, when one of the five senses is used to gather information, it constitutes making an observation. Observations can involve both qualitative and quantitative data, and they provide evidence that scientists use to form conclusions.

Explanation:

When scientists use one of their five senses to gather information, they are A. making an observation. Scientists usually perform observations by using one or more of their five senses to gain an understanding of the properties or behaviors of a substance or a system. These data can be qualitative (descriptive) or quantitative (consisting of numbers). For instance, seeing a plant growing (observation) and measuring its growth over weeks (data collection). From these observations, the scientist can infer conclusions based on the evidence collected. In brain studies, the activity in the brain during specific tasks is observed, which could be the basis for conclusions about brain functionality.

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Answer: Option (A) is the correct answer.

Explanation:

Nitrogen is a non-metal and it is known that non-metals do not conduct electricity. Thus, it will be least conductive out of the given options.

Whereas antimony (Sb) is a metalloid. Metalloid are the substance that show properties of both metals and non-metals. Thus, antimony will conduct electricity.

On the other hand, bismuth (Bi) is a metal hence, it will conduct electricity.

Thus, we can conclude that the order from least conductive to most conductive will be nitrogen (N), antimony (Sb), bismuth (Bi).

Answer: The correct answer is Option A.

Explanation:

Conductivity of an element is defined as the tendency to conduct electricity. This property is shown mostly by metals and then by some metalloids and least by non-metals.

Metals are defined as the elements which loose electrons easily and thus can easily conduct electricity due to the presence of free electrons.

Metalloids are defined as the elements which show the properties of both metals and non-metals. Some metalloids are conductive, some are not.

Non-metals are defined as the elements which gain electrons easily and thus cannot conduct electricity easily and are considered as non-conductive.

From the given options:

All the three elements belong to same group but nitrogen is a non-metal, antimony is a metalloid and Bismuth is a metal.

Thus, the order of conductivity follows:

Hence, the correct answer is Option A.

Answer: The correct answer is Option d.

Explanation:

Dry air is composed of a mixture of gases like argon, oxygen, nitrogen, carbon dioxide and many other gases present in trace amount.

The percentage of these gases by volume in dry air is:

Carbon dioxide = 0.03%

Argon = 0.93%

Oxygen = 20.95%

Nitrogen = 78.09%

Hydrogen = Trace amounts

From the above percentage values, we can easily say that nitrogen has the highest percentage by volume in dry air. Hence, the correct option is d.

Answer:

D. None of the above

Explanation:

All the answer choices listed only have 2-3 items in the electron configuration.