Examlex
What is the tough outer covering of a grain kernel called?
Cations
Positively charged atoms.
Electrons
Subatomic particles with a negative charge, orbiting the nucleus of an atom and involved in chemical bonding and electricity.
Positive Charge
A type of electric charge, typically carried by protons, that repels other positively charged particles and attracts negatively charged particles.
Negative Charge
An electrical charge that results from having more electrons than protons in an atom or molecule.
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