how do the isotopes hydrogen-1 and hydrogen-2 differ?

Answer 1

Hydrogen-1 has a nucleus that consists of only a proton. Hydrogen-2 has a nucleus that consists of a proton and a neutron. They are both stable, but hydrogen-2 is only a very small percentage of naturally occurring hydrogen. Hydrogen-1 is often called Protium while hydrogen-2 is called Deuterium. Deuterium was first discovered when a researcher (I can't remember who) evaporated away a large amount of water and found the isotope in the remainder. The third isotope of hydrogen is hydrogen-3 having a nucleus of one proton and two neutrons. This is Tritium and it is radioactive.

Answer 2

Isotopes of atoms differ in the amount of neutrons within the nucleus of the atom, the amount of protons and electrons remain the same. The most common Hydrogen atom consists of a proton and an electron giving it an atomic mass of 1. Hydrogen-2 consits of a proton and neutron nuclei and an electron having an atomic mass of 2.
Isotopes whilst remaining the same element have different properties, classic examples are Uranium 235 and 238. So whilst they are both forms of Hydrogen they can have very different effects when brought into play. What they are I leave to another

Answer 3

the number following the element refers to the mass number so if you take the mass number of any isotope and subtract the protons you will get the number of neutrons. in hydrogen-1's case you have one proton and no neutrons and in hydrogen - 2's case you have one proton and one neutron.

Answer 4

hydrogen-1 has only no neutron, and hydrogen-2 has 1 neutron

Answer 5

hydrogen-1 has no neutrons and hydrogen-2 (also called deuterium) has 1 neutron

Answer 6

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a) 1H has atomic mass 1, 2H has atomic mass 2 b) Atomic number is 1 for both and both sit at position 1 on the periodic table d) Chemically they are quite similar with the most significant difference being 2H compounds are usually denser.

Answer 7

Different mass.