Which two terms relate and why? atom, amu, element

Atoms and element do relate with each other.

Atoms are defined as the smallest particle of an element which cannot be divided further keeping its physical and chemical properties intact, and they take part in a chemical reaction.

Elements are defined as the substances that are components of matter and cannot be further divided into simpler substances.

AMU or the Atomic mass unit is defined as a unit that is used to express atomic mass and is equal to mass of a hydrogen ion.

Elements are actually formed of atoms that are present in nature and atoms do form elements and even compounds. So they are inter related with each other.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6