Question

the image below shows a model of a lithium atom. how many neutrons are in this atom? 3e− 3 4 7 10

Explanation:

Step1: Recall lithium's atomic number

Lithium (Li) has an atomic number of 3. The atomic number is equal to the number of protons. So, number of protons = 3.

Step2: Count particles in nucleus

In the model, count the total number of particles in the nucleus (protons and neutrons combined). There are 7 particles in the nucleus.

Step3: Calculate number of neutrons

Use the formula: Number of neutrons = Total particles in nucleus - Number of protons. So, number of neutrons = 7 - 3 = 4.

Answer:

4