Chemical bonds tend to occur so that an atom gets a "full" valence shell. Two main types of bonds are ionic and covalent. What is the main way these two types of bonds differ?

The two bonds differ mainly in the number of electrons shared. In covalent bonding, sharing always happens

in pairs, whereas in ionic bonding, single electrons can be shared.

The two bonds differ mainly in the whether whole or partial electrons are shared. In covalent

bonding, whole sharing always happens, whereas in ionic bonding, partial electrons can be shared.

In covalent bonding the two (or more) atoms bonded together share electrons. In ionic bonding, one atom

loses one (or more) electrons, while another atoms gains one (or more) electrons.

In ionic bonding the two (or more) atoms bonded together share electrons. In covalent bonding, one atom

loses one or more) electrons, while another atoms gains one or more) electrons.

In covalent bonding the two (or more) atoms bonded together share electrons. In ionic bonding, one atom loses one (or more) electrons, while another atoms gains one (or more) electrons.

Explanation:

Atoms of molecules and elements come together chemically. The atoms of the same or different elements are joined together by means of chemical bonds, which are of different types depending on how it is formed. These chemical bonds include; covalent bonds, ionic bonds, hydrogen bonds etc.

- Covalent bonding occurs between atoms in such a way that the two or nore atoms involved share their valence electrons. Examples are CO, H2O etc

- On the contrary, ionic bonding also called electrovalent bond, is that type of bonding in which one atom transfers electrons to the other atom. Hence, the atom that loses electrons becomes more electropositive while the atom that accepts electrons become more electronegative. Examples are MgO, CaCl2 etc

you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

credit: gradman555p98x9p

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