An anion always . has a positive charge has a negative charge contains a group of two or more atoms with a positive charge contains a metal and a nonmetal forms covalent bonds

has a negative charge

Explanation:

Ions may be defined as the elements that acquires positive or negative charge over them. Two main types of ions are cations and the anions that are formed by the gain or loss of the element.

Cations are formed when the electrons are lost and thus protons outweigh the electrons, thus generating a positive charge.

Example: ,

Anions are formed when the electrons are gained and thuselectrons outweigh the protons, thus generating a negative charge.

Example: ,

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.