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The reaction p + e- → + e+ is not possible because
Onset Of Puberty
The period in which a person begins to develop secondary sexual characteristics, marking the start of sexual maturation.
Sex Difference
The distinctions, whether biologically or culturally influenced, between males and females.
Boys And Girls
Terms that denote male and female children or young people, respectively.
First Menstruation
Also known as menarche, it signifies the onset of menstruation in individuals, marking a significant point in the transition from childhood to womanhood.
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