Check out the periodic table again. How many spaces have been left for the possible discovery of new elements?

What types of subjects did public high schools in the 1900s emphasize and why

The original term of was descriptive of lower-class people who performed manual labor.

Plz me in 1756 george washington was sent on a mission to, a. build a fort at the point where the allegheny and monogahela rivers form the ohio river. b. attack the french at fort duquesne. c. attack the french at fort neccessity. d. deliver a message to the french demanding that they leave the ohio valley.