Question

slide 14: practice: $^{18}_{8}o$ atomic number = # of protons = # of neutrons = # of electrons =

Explanation:

Step1: Recall atomic number concept

The sub - script in $^{18}_{8}O$ is the atomic number. So, atomic number = 8.

Step2: Relate protons to atomic number

The number of protons is equal to the atomic number. So, # of protons = 8.

Step3: Calculate neutrons

The mass number (sup - script) is 18. Mass number = protons + neutrons. So, # of neutrons=18 - 8 = 10.

Step4: Determine electrons for neutral atom

For a neutral atom, the number of electrons is equal to the number of protons. So, # of electrons = 8.

Answer:

Atomic Number = 8

of Protons = 8

of Neutrons = 10

of Electrons = 8