What happens when you grow the same crop over and over again in the same field


Answer 1
Answer: Well there's a couple reasons why. First, the land itself can become “tired" and less fertile. This is because the same type of crop planted repeatedly in the same area keeps draining the land of the same nutrients needed for that plant's growth. Pest can also plant their nest near the crop if the farmer continues to plant the same crop in the same place. 

Which is the reason why things such as "crop rotation" exist to keep things fresh, and prevent what I described above from happening.

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Write the electron configuration of the atom in the third row of the periodic table that has the smallest ei4.



                 Silicon = Si =  1s², 2s², 2p⁶, 3s², 3p²


                         Ionization Energy (Ei) is the minimum amount of energy required to remove the valence electron from the valence shell of an atom in its gaseous state. Ionization Energies are further classified as,

                                      Ei₁  =  First Ionization Energy

                                     Ei₂  =  Second Ionization Energy

                                     Ei₃  =  Third Ionization Energy

                                     Ei₄  =  Fourth Ionization Energy

And so on......

First ionization energy is the energy required to remove electron from neutral atom. Second ionization energy is the energy required to remove electron from M⁺ ion. Third ionization energy is the energy required to remove electron from M⁺² and so on.......

Ei₄ in case of Si means the removal of electron from Si⁺³. As after the removal of fourth electron Si gains a noble gas configuration of Neon that is why it has the least fourth ionization energy.


People are able to hear footsteps because the sound made by a foot hitting the floor travels through the air to reach their ears. is this absorption or transmission


The answer is transmission.

I believe that would be absorption.


An experiment using alpha particles to bombard a thin sheet of gold foil indicated that most of the volume of the atoms in the foil is taken up by ...


Empty space. We now know that this is the gap between the electrons and nucleus.

The experiment that used alpha particles to bombard a thin sheet of gold foil indicated that most of the volume of the atoms in the foil is taken up by

Further Explanation:

Rutherford’s experiment:

Rutherford's model of atom is the classic model of the atom instead of having many limitations. He designed an experiment that used alpha particles emitted by radioactive elements as objects that can demonstrate the structure of the atom. Rutherford showed his own physical model for the subatomic structure as a result of the experimental observations.

The postulates of Rutherford’s model are as follows:

1. An atom consists of a positive charge in a very small volume. Most of its mass is concentrated in a very small region of the atom and this region was termed as the nucleus of the atom.

2. The nucleus of the atom is surrounded by the negatively charged particles which were called electron. These electrons were supposed to revolve around the atomic nucleus in a circular path at a very high speed. This circular path is called orbit.

3. A very strong electrostatic force of attraction holds together the negatively charged electrons revolving around the nucleus positively charged concentrated in the nucleus.

Limitations of Rutherford’s model:

1. It did not tell anything about the distribution of electrons in various orbits.

2. This model failed to explain Maxwell’s theory of electromagnetic radiation.

3. It was unable to explain the stability of an atom.

Therefore most of the volume of an atom is taken up by empty space in the atom.

Learn more:

1. The major contribution of Antoine Lavoisier to chemistry:

2. Example of physical change:

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Atomic Structure

Keywords: Rutherford, atom, volume, nucleus, orbit, postulates, limitations, Maxwell, electromagnetic radiations, distribution of electrons, stability of atom.


What would most likely be included in the “Analysis” section of a lab report?


Laboratory questions and answers based on your data would most likely be included in the “Analysis” section of a lab report.


Analysis is the process of breaking a complex topic or substance into smaller parts in order to gain a better understanding of it. The technique has been applied in the study of mathematics and logic since before Aristotle (384–322 B.C.), though analysis as a formal concept is a relatively recent development.


I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

This is where you analyze your data. Aren't there questions in the lab report to answer? This is where you would usually have lab questions that you would answer based on your data. This is also where you state if your hypothesis was correct or incorrect. hope that helpd

What is the average melting point for a solid?


The average melting point for a solid is -38.83 degrees Celsius and -37.89 degrees Fahrenheit.

Balance the following equations: 1. __N2+__F2-->__NF3
2. __C6H10+__O2-->__CO2+__H2O
3. __HBr+__KHCO3-->__H2O+__KBr+__CO2
4. __GaBr3+__Na2SO3-->__Ga2(SO3)3+__NaBr
5. __SnO+__NF3-->SnF2+N2O3



I won't give you the answers. It won't help you in the long run. Instead, let's look at it logically:

You have two of something and you're gonna turn it into something else. That thing doesn't just disappear, it has to stay there. You can't act as if there's only one of them in the end result, that doesn't make sense.

Balancing chemical equations is about finding the ratios at which things occur. In the first example,

N2 + F2 -> NF3

You have two N on the left, one on the right. Better double the one on the right so you have equal amounts.

N2 + F2 -> 2NF3

Now, since there are two Ns on each side, there must be 6 Fs on the right (2×3). You only have 2 on the left side, so the next question is: how do I get from 2 to 6?

Simple! Multiply by 3:

N2 + 3F2 -> 2NF3

Let's check left side vs right side to see if we're right:


2 N

6 F (3×2)


2 N

6 F (2×3)

Left side = Right side, so that's the right answer.

Don't let questions like these stress you out. Just balance out the numbers so that there's the same amount of stuff on each side.


What is the independent variable in patty experiment


It’s the variable that you are changing. For example. Two flower pots have the same soil same type of flower and same sunlight but the independent variable would be the amount of water they got because they didn’t get the same amount
The independent variable would most likely be what’s changing and that is the patty

Neon is a gas made up of one type of atom. Which term best describes neon? A) molecule
B) element
C) compound


It is an element because it is one element. If there were more it'd be a compound. It's the same thing for a molecule. It wouldn't be a mixture either because it isn't being "mixed" together with anything.

Which class of elements best conducts electricity


Metals best conducts electicity
Metals conduct all electricity.
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