Examlex
Astronomers refer to the beginning of the Universe as the _______________.
Atom Nucleus
The central core of an atom, containing protons and neutrons, around which electrons orbit.
AC Sinewave
Represents alternating current electricity in a waveform that alternates in a sinusoidal manner, typical of household electrical supply.
Ion
An atom with either an excess or a deficiency of electrons in the valence; a negatively or positively charged particle.
Surplus of Electrons
A condition where there are more electrons than protons in a system, leading to a negative charge.
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