Which of the following lists the correct symbol for the ion that tin forms when it loses 2 electrons, the correct classification
of the ion as an anion or a cation, and the name of the ion? a
Sn2+; anion; tin ion
b
Sn2+; cation; tin(II) ion
c
Sn2–; anion; tin(II) ion
d
Sn2+; cation; tin ion
Atoms of elements can either lose or gain electrons to become charged atoms i.e ions. An atom that loses electrons to become positively charged is called a CATION while one that gains electrons to become negatively charged is called an ANION.
In this case, tin element (Sn) loses 2 electrons to become positively charged with a charge number of 2 i.e Sn2+. Since it is a positively charged ion, it is called a CATION and named Tin (II) ion.
Answer: synthesize a pre-rRNA 45S (35S in yeast), which matures and will form the major RNA sections of the ribosome. RNA polymerase II synthesizes precursors of mRNAs and most snRNA and microRNAs. RNA polymerase III synthesizes tRNAs, rRNA 5S and other small RNAs found in the nucleus and cytosol.
