An atom of element a has 50 protons, what would the elements atomic number be?

Sam hated the long nights of winter! his mother called him in from playing so early: around 4: 30 pm! it is usually dark out when sam is eating supper. what letter represents the long nights where sam lives? a) a. b) b. c) c. d) d.

The first mathematical theory of tides was introduced by: galileo kepler newton cousteau

What is the only country that borders portugal