Question

question 6 (1 point) build a lithium atom with the following symbol and fill in the table below it. 8 li 3 name lithium-__ number of protons number of neutrons mass natural abundance __% stable? unstable blank 1: blank 2: blank 3: blank 4: blank 5:

Explanation:

Step1: Identify isotope name

The isotope is named based on its mass - number. Here the mass - number is 8, so it is Lithium - 8.

Step2: Determine number of protons

The atomic number (bottom number) represents the number of protons. For Li, the atomic number is 3, so the number of protons is 3.

Step3: Calculate number of neutrons

The mass - number (top number) is the sum of protons and neutrons. Let $n$ be the number of neutrons. We know mass - number $A=8$ and number of protons $p = 3$. Using the formula $A=p + n$, we get $n=A - p=8 - 3=5$.

Step4: Identify mass

The mass of the isotope is equal to its mass - number in atomic mass units. So the mass is 8 amu.

Step5: Determine natural abundance

Lithium - 8 has a very low natural abundance. It is a radioactive isotope and its natural abundance is approximately 0%.

Answer:

Blank 1: 8
Blank 2: 3
Blank 3: 5
Blank 4: 8
Blank 5: 0