Which best describes how magnesium (mg) and oxygen (o) bond? they form an ionic bond by exchanging two electrons. they form an ionic bond by exchanging three electrons. they form a covalent bond by sharing one electron. they form a covalent bond by sharing four electrons.

Option (a) is the correct answer.

Explanation:

When a bond is formed by sharing of electrons then it is known as a covalent bond and when a bond is formed by transfer of electrons then it is known as an ionic bond.

Atomic number of magnesium is 12 and its electronic configuration is 2, 8, 2. Atomic number of oxygen is 8 and its electronic configuration is 2, 6.

So, in order to attain stability magnesium will lose two electrons and oxygen will gain two electrons. Hence, an ionic bond will be formed.

Thus, we can conclude that the statement they form an ionic bond by exchanging two electrons best describes how magnesium (mg) and oxygen (o) bond.

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.