An atom of hydrogen consists of one surrounded by one

An atom of hydrogen consists of one proton surrounded by one electron.

Explanation:

Hydrogen is the first element of the periodic table, and its atom is the simplest atom of the universe. It has an atomic number of 1, which means it has 1 proton in the nucleus, and it has one electron surrounding this nucleus. Hydrogen also has some isotopes which contain neutrons in the nucleus (such as the deuterium, whose nucleus is made of 1 proton and 1 neutron, with still 1 electron surrounding it).

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west