From 1940, there have been four main laboratories that have worked to produce elements with atomic numbers greater than 92. Describe what IUPAC’s role would be in such a situation. Points to consider include:
- What are the criteria that must be followed for an element to be made?
- How does the element name get chosen? And who is allowed to choose?
- Which scientist is given the credit for making the element?

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.