Answer:
Zr. You should be able to see it on a periodic table.
Explanation:
Answer:
Here it is (sorry its late)
Explanation:
<span class="sg-text sg-text--link sg-text--bold sg-text--link-disabled sg-text--blue-dark">
docx
</span>
<span class="sg-text sg-text--link sg-text--bold sg-text--link-disabled sg-text--blue-dark">
docx
</span>
Answer:
The hardness is more than 2.5. Hope this helps.
Answer:
Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.
Answer:
STM = Scanning Tunneling Microscope
Explanation:
STM and its significance
<em>It is the microscope that can take </em><u><em>images of the particles at the atomic scale</em></u><em>.It opens the door to under the </em><u><em>nano-scale process .</em></u>
<u><em>In 1986 Heinrich Rohrer won the nobel prize for its discovery</em></u>
<u><em>It doesn't magnify images like other microscopes .</em></u>
<u><em>It uses the principle of quantum tunneling. </em></u>
Working :
<em>A fine needle like tip is scanned on the surface of electrically conducting sample. When voltage is applied , the electron jumps between the suface of the tip and sample . This flow of electron is detected by the detector. It can resolve the image upto 0.000000001 m or 1 nm (nanometer)</em>
Uses :
- The STM is used in molecular science called nanotechnology to study nano phenomenon
- Its prototype AFM are used to Study wide range of Nano-particles
- STM is used in atomic deposition of metals with required scientific pattern, which can be used as nanodevices themselves.
- It is used to study electron-friedel oscillation on the surface of metals.
- It is used to modify sample surface.