Which list gives key events regarding the exploration of space in the correct order, beginning with the earliest?(1 point) first humans on the moon, first lander on Mars, first space shuttle flight

first humans in space, first space shuttle flights, first humans on the moon

first humans on the Moon, first humans on Mars, launching of the International Space Station

first space shuttle flight, Hubble Space telescope launch, last humans on the moon

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.