How many neutrons are present in a nucleus whose atomic number is one and whose mass number is one?

The rules of engagement (roe) working group is often used to (select all that apply.)

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons