Question

complete the data table below by filling in the missing data.

Explanation:

Step1: Determine the number of protons

The atomic number of helium is 2, so the number of protons is 2.

Step2: Determine the number of neutrons

The mass number is 4. Using the formula \( \text{Neutrons}=\text{Mass number}-\text{Protons} \), we have \( 4 - 2=2 \).

Step3: Determine the number of electrons

For a neutral atom, the number of electrons equals the number of protons. So the number of electrons is 2.

Step4: Determine the atomic mass

The atomic mass of helium - 4 is approximately 4.00 amu (since it's a simple isotope with mass number 4).

Step5: Determine the abundance

Helium - 4 has an abundance of 99.999866%.

Step6: Determine stability

Helium - 4 is a stable isotope.

Answer:

Protons: 2
Neutrons: 2
Electrons: 2
Atomic Mass: 4.00
Abundance: 99.999866
Stable or Unstable: stable