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

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

digestion

it excretes wastes