Which is classified as an inner transition element? a) calcium
b) copper
c) fermium
d) helium

The identities of substances are the same before and after which type of change

Write and balance the chemical equation that represents the reaction of aqueous sulfuric acid with aqueous sodium hydroxide to form water and sodium sulfate. include phases.

Apropane torch is lit inside a hot air balloon during preflight preparations to inflate the balloon. which condition of the gas remains constant