Examlex
Delaying serious involvement in dating relationships until age ________ appears to be the most favorable pattern for healthy psychosocial development.
Water
A transparent, tasteless, odorless, and nearly colorless chemical substance which is the main constituent of Earth's hydrosphere, and the fluids of all known living organisms.
Mass Number
Of an isotope, the total number of protons and neutrons in the atomic nucleus.
Neutrons
Particles in an atom with no electrical charge, found in the nucleus alongside protons.
Protons
Positively charged subatomic particles found in the nucleus of an atom, contributing to the atomic number and mass.
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