Hello!
The electron configuration for helium is 1s2
Answer:
The DNA is cut using special chemicals called restriction enzymes,.
DNA ligase are used to insert genes and other pieces of DNA into plasmids.
The order of placement of the elemnts on the modern Periodic Table is determinated by:
1)atomic number (Z=number of protons).
<h2>b is the correct answer</h2>
according In my course I studying it all
