Nepal
Nepal has never won an official Olympic medal (or a gold medal). They did in fact however win a bronze medal in taekwondo at the Seoul Olympics in 1988, but unfortunately that came at a time when taekwondo was only an exhibition sport, so it is considered unofficial.
none
Leander Paes of India won the Bronze medal in 1996 Atlanta Olympics.
Yes Argentina have won a gold medal at the Olympics.
She has won a silver in 1998
She was 16 when she won her first medal. It was a silver medal.
Team, medal, hockey, olympics
Hungary won the gold medal in the Women's épée competition at the Rio 2016 Olympics.
Elena won a gold medal at the Beijing Olympics in 2008. She has also won a silver medal at the Sydney Olympics in 2000.
Sweden won the gold medal in the Olympics.
Yes