Please answer quickly! Match the element with its description.

questions::
a. sodium b. silicon c. bromine d. argon
choices::
a. nonreactive gas b. has properties of metals and nonmetals c. malleable, soft and shiny d. highly reactive gas

What kind of ion is contained in salts that produce an acidic solution? a positive ion that attracts a proton from water a positive ion that releases a proton to water a negative ion that attracts a proton from water a negative ion that releases a proton to water

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.

When scientists are ready to publish the results of their experimentation, why is it important for them to include a description of the procedures they used?