Which describes a chemical change? A. A new substance is created.

B. It is a permanent change.

C. It can be a physical change.

D. A phase change is occurring.

What’s the scientific notation for the number 6,840,000,000

Identify and describe the three ways that mutations affect organisms.

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.