Most rare earth metals are trivalent because they have three valence electrons in their outermost shell. This makes it energetically favorable for them to lose these three electrons to achieve a stable electron configuration. Additionally, the trivalent state allows rare earth metals to form stable compounds with other elements, making them useful in various industrial applications. **

No, smartphones are not possible without rare earth elements. These elements are essential components in the production of smartphones, as they are used in the manufacturing of various parts such as screens, batteries, and speakers. Without rare earth elements, smartphones would not be able to function as they do today, making them a crucial component in the production of these devices. **

Secret Rare, Ghost Rare, and Ultimate Rare cards can be found in various booster packs of the Yu-Gi-Oh! Trading Card Game. These rare cards are typically included in special sets or premium collections, such as the Legendary Collection series, Premium Gold series, and various special edition sets. Players can also find these rare cards in certain booster packs released as part of main core sets, such as the Hidden Arsenal series or certain special edition booster sets. **

Dalmatians are not considered rare, as they are a popular breed of dog. They are known for their distinctive black or liver spotted coat and are often associated with firehouses and the Disney movie "101 Dalmatians." Dalmatians can be found in many parts of the world and are commonly seen in households as family pets. **

Yes, Relaxos are considered rare because they are not commonly found in the wild. They are a special type of Pokémon that is known for their unique appearance and abilities. Trainers often seek out Relaxos due to their rarity and powerful moves, making them a valuable addition to any team. **

Rare is something that is not commonly found or seen. It is something that is unusual, scarce, or unique. Rare items or occurrences are often highly sought after or valued because of their scarcity. In nature, rare species are those that have a very small population size or are at risk of extinction. **

In general, the number 70 is not considered rare as it is a common number that falls within the range of typical numerical values. However, the perception of rarity can vary depending on the context in which the number is being considered. For example, in certain statistical or numerical analyses, the number 70 may be considered rare if it falls outside of the expected range or distribution of values. **

Yes, INFPs are considered to be one of the rarer personality types, making up about 4-5% of the population. They are known for their creativity, empathy, and idealism, which can make them stand out in a society that may not always prioritize these traits. Their unique perspective and deep emotional understanding can make them valuable contributors in many areas of life, from art and literature to counseling and social justice advocacy. **