NDT Radiation Safety — answer each question correctly to unlock the next neutron
Element
H
Protons
1
Neutrons
0
Mass no.
1
Proton (p⁺)
Neutron (n)
Answer the question to unlock
Neutron bank — drag into nucleus
Stable
Hydrogen
¹H — Protium
ElementHydrogen (H)
Protons1 — defines the element
Neutrons0
Mass number1
This is the simplest atom in the universe — 1 proton, 0 neutrons. The number of protons defines which element you have. Hydrogen always has 1 proton.
Question 1 of 3
Lab complete
You built all three isotopes of hydrogen and discovered why the same element can behave so differently — all because of neutrons.
1
Element explored
3
Isotopes built
—
First-try correct
Key takeaway: Protons define the element. Neutrons determine the isotope. Too many neutrons can make a nucleus unstable — and unstable nuclei are radioactive.