1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
riadik2000 [5.3K]
3 years ago
13

Both coal and diamonds are forms of elemental carbon. Coal is brittle while diamonds are considered to be the hardest Of all sub

stances known. What is the appropriate justification for this
Biology
1 answer:
Art [367]3 years ago
8 0

arbon, as with many elements, can arrange its atoms into several different geometries, or "allotropes." In pure diamond, every carbon atom is covalently bonded to exactly 4 other carbon atoms in a very specific and energetically favorable geometry. The diamond cannot be broken or scratched unless many covalent bonds are broken, which is difficult to do. In another common allotrope, graphite, every carbon atom is covalently bonded to only 3 other carbon atoms, and the atoms are arranged in sheets that are not covalently bonded to each other. The sheets can be broken apart easily, ultimately meaning that graphite can be easily scratched. Coal is composed of particles of different allotropes of carbon, and some "amorphous carbon," which has no defined geometry in its atomic structure. Without a continuous network of covalent bonds, coal is easily scratched (i.e. it is not hard).



You might be interested in
In environmental cleanup, bacteria can help plants by what?
Scilla [17]
The contamination cleanup strategy called bioremediation—using naturally occurring or genetically modified microbes to clean up our messes—is gaining steam, as scientists devise new ways to use bugs against mercury, oil spills, radioactive waste and more.
6 0
2 years ago
Read 2 more answers
Which of the following is an example of primary succession?
kiruha [24]

Answer:

B. the appearance of lichens and mosses in an area where a glacier has recently melted away

Explanation:

Ecological succession, which refers to the series of changes that occurs over time in an ecosystem, can be of two types namely: primary succession and secondary succession.

Primary succession is a succession that involves an area where no form of life has grown previously, hence, the area of land is barren e.g bare rock. Primary succession is first colonized by species called PIONEER SPECIES e.g. lichens, mosses etc.

According to this question, "the appearance of lichens and mosses (pioneer species) in an area where a glacier has recently melted away" is an example of PRIMARY SUCCESSION.

4 0
3 years ago
32 points! :)
DochEvi [55]

Answer:

Its diabetes i just took it. its right.

Explanation:

Please rate me brainliest!

6 0
3 years ago
Read 2 more answers
How do you tell if a dog is pregnant?
nasty-shy [4]
During the first 2-3 weeks you will not see any physical signs. Look at your dog's nipples, for if it is pink, that may be an indication. Be sure to observe your dog's body and it's weight.
5 0
2 years ago
Read 2 more answers
Given that equal amounts of the different mRNA’s were injected into fertilized frog eggs, which of the following conclusions is
Degger [83]

Answer:

Answer is A. B-hemoglobin mRNA is translated more efficiently than is a-hemoglobin mRNA.

Explanation:

The introduction of electric charge into a gel or fluid, causing or resulting in the movement of the charged particles in the gel or fluid, is referred to as the electrophoresis. It can also be explained as a separation method or technique which is based on the movement of particles or ions in an electric field.

The electrophoresis is used in separating DNA fragments , RNA or protein, based on their size and charge.

4 0
3 years ago
Other questions:
  • Which of these is a plant organ responsible for absorbing light energy to make food?
    15·2 answers
  • SCIENCE HELP!!!
    11·2 answers
  • A social interaction in which both the donor's fitness and the recipient's fitness are increased is called
    6·1 answer
  • Match the layers of the Earth to their proper composition. Inner Core A) Liquid rock
    11·2 answers
  • What is the ecosystem service of water in a reservoir behind a dam
    5·1 answer
  • Muscle cells would contain a high number of
    8·2 answers
  • Match the terms to their definition. 1. constructive a process in which the edge of one crustal plate sinks below the edge of an
    6·1 answer
  • What condition is required for piles of sediment to become a sedimentary rock?
    7·2 answers
  • In the reaction 6CO 2 + 6H 2O → C 6H 12O 6 + 6O 2 carbon dioxide is one of the
    11·1 answer
  • What cnidarian form is characterized by a cylindrical body with a mouth surrounded by tentacles at the end of the cylinder oppos
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!