10. what is the isotope notation for a nucleus with 1 proton and 2 neutrons? a: mass #? x: symbol? z: atomic…
10. what is the isotope notation for a nucleus with 1 proton and 2 neutrons? a: mass #? x: symbol? z: atomic #?
Answer
Explanation:
Step1: Determine the atomic number (Z)
The number of protons is the atomic number. Since there is 1 proton, $Z = 1$.
Step2: Determine the mass number (A)
The mass number is the sum of protons and neutrons. With 1 proton and 2 neutrons, $A=1 + 2=3$.
Step3: Identify the element symbol (X)
The element with atomic number 1 is hydrogen, symbol H.
Step4: Write the isotope notation
The isotope notation is ${Z}^{A}X$, so it is ${1}^{3}H$.
Answer:
$_{1}^{3}H$