WILL GIVE BRAINLEST Which of the following are atomic ions? Select all that apply. Cl- Ca2+ K2O O2-

Cl-

Ca2+

Explanation:

An ion is a charged atom or group of atoms. An ion may be formed from an atom or from a molecule.

When an ion is formed from an atom, the atom now has either an excess or an insufficient number of electrons. This will lead to the development of a negative or positive charge in the atom as the case may be.

Cl- and Ca2+ are two ions formed from atoms, the first one has an excess of one electron while the other have lost two electrons

d) center of the mid-ocean ridge

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.