Which pair of elements has atoms with the same number of valence electrons ? a. indium (In) and lead (Pb)

b. potassium (K) and bromine (Br)

c. silicon (Si) and germanium (Ge)

d. astatine At) and radon (Rn)

What is the solubility of substance?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

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