What is one limitation of descriptive investigations?
They cannot show cause and effect.
They produce lots of data.
They can be done at a lower cost.
They follow procedures.

the answer is A. They cannot show cause and effect

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

- lead + phosphoric acid = hydrogen + lead(ii) phosphate