Question

specify the number of protons (#p⁺), neutrons (#n⁰) and electrons (#e⁻) given the following symbol:
₈¹⁶o²⁻
#p+
#n0
#e-

Explanation:

Step1: Identify atomic number

The sub - script 8 is the atomic number (Z), which is equal to the number of protons. So, #p⁺ = 8.

Step2: Identify mass number

The super - script 16 is the mass number (A). The number of neutrons is calculated as #n⁰=A - Z. So, #n⁰ = 16 - 8=8.

Step3: Determine number of electrons

The ion has a charge of 2⁻, which means it has gained 2 electrons. For a neutral atom, the number of electrons equals the number of protons. For O²⁻, #e⁻=8 + 2=10.

Answer:

#p⁺: 8
#n⁰: 8
#e⁻: 10