Why is it harder to remove an inner shell electron than a valence electron from an atom?

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

How will the emission of an alpha particle affect the atomic number of an atom

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.