Answer:
All of those answer are correct.
Answer:
B
Explanation:
For metals, the further away the valence electrons are from the nucleus, the higher the reactivity of the elements. Unlike halogens that are more reactive if the valence orbital shells are closer to the nucleus. This is due to ionization energies – which is the minimum energy required to discharge an electron from its orbit.
For metals this should be lower because they need to lose electrons to attain a stable electron configuration. For halogens it should be high because they don't need to lose electrons, but rather gain, in order to attain stable electron configuration.
Electrons in their orbital shells need to occur in pairs (with opposite quantum states) to be in stable configuration and as long as an atom has orbitals with single electrons, the atoms will be reactive as opposed to when its orbitals are ‘full’.
The best answer to the question stated above is <span>Building wooden furniture.
>Renewable Resource are </span><span>resource which are replaced naturally and can be used again.
</span> Examples:<span>oxygen, fresh water, solar energy, timber.</span><span>
></span><span>Intensive cultivation of farmland that exhausts soil nutrients. Is an example of human acts which led to the depletion of renewable resource.
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What do the Gram stain, acid-fast stain, and endospore stain have in common?
A. used on a wet mount of the specimen
B. use heat to force the dye into cell structures
C. outcome based on cell wall differences
D. use a negative stain technique
E. are simple stains
Answer: Option C
Explanation:
The staining can be defined as a procedure which is carried out in order to make the study easy. As many of the bacterial species appear similar and are transparent so staining is done in order to see what bacterial species incorporates what color in them to make the study more easy.
Staining also depends on the type of chemicals present in the cell wall of the organism( cell wall composition). Different organisms have different staining techniques and stains by which they show color.
This ability tells alot about their characters. Like the fast stain bacteria are very hard to stain. They are mycobacterium on which normal stain do leaves any effect because of the cell wall composition. This property states that they are resistant to many of the chemicals . Likewise gram staining and endospore staining is also dependent on the type of chemical that is found in their cell wall.
