What does it mean if an element is isoelectronic? a. isoelectronic is the same as isotope c. isoelectronic is a term to describe a group of atoms or ions having the same number of electrons b. isoelectronic is a term that only applies to radioactive elements d. none of the above

Can someone me with questions 12 and 13 plz.

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

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.