Most goals scored by one team in one period of hockey?

7 - Joe Malone, Quebec, January 31, 1920, at Quebec is the most in NHL history.

Joe Malone, was the greatest scorer in the early history of the NHL, Malone began playing professional hockey in 1909. He became captain and coach of the Quebec Bulldogs in 1911 and promptly led them to two consecutive Stanley Cup championships. He scored 9 goals in one of the 1913 playoff games.

After the Quebec team folded, Malone joined the Montreal Canadiens in the NHL's first season, 1917-18. He scored 5 goals in their first game and ended the season with 44 goals in 20 games. The Quebec franchise resumed play in 1919 and Malone returned to the team. On January 31, 1920, he scored 7 goals in a game, still the NHL record, and he had 6 goals in the last game of the season. He led the league for the second time with 48 points on 39 goals and 9 assists. Malone returned to Montreal for one season, went to Hamilton, Ontario, for another, then played with Montreal again in 1922-23. He retired after just nine games the following season. He played 125 regular season games in the NHL, scoring 146 goals, with 21 assists. In 9 NHL playoff games, he had 5 goals.