Examlex
Instead of having two sex chromosomes,females with Turner's syndrome have three.
Mass
A measure of the amount of matter in an object, usually expressed in grams or kilograms.
Isotopes
Variants of a particular chemical element which have the same number of protons in their nuclei but differ in the number of neutrons, leading to different atomic masses.
Atomic Number
The number of protons in the nucleus of an atom, which defines the chemical element.
Mass Numbers
The total number of protons and neutrons in the nucleus of an atom, indicating its atomic mass.
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