What’s the hyphenated notation for a hydrogen atom that has 2neutrons

Hey there!

In hyphenated notation, we have the name of the element, a hyphen, then a number that is the sum of protons and neutrons.

Hydrogen has one proton, and this isotope has 2 neutrons, so the sum of the two is 3.

The name of this isotope is hydrogen-3.

Hope this helps!

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.