Question

atom a

1. how many protons are in atom a?
2. how many neutrons are in atom a?
3. how many electrons are in atom a?
4. what is the atomic mass of atom a?
5. what is the atomic number of atom a?

atom b
atom b?
atom b?
atom b?
atom b?
atom b?
atom b?

Explanation:

Step1: Count protons in Atom A

In the diagram of Atom A, count the number of positively - charged particles (protons) in the nucleus. Assume from the diagram there is 1 proton.

Step2: Count neutrons in Atom A

Count the number of neutral particles (neutrons) in the nucleus of Atom A. Assume from the diagram there are 0 neutrons.

Step3: Count electrons in Atom A

Count the number of negatively - charged particles (electrons) around the nucleus of Atom A. Assume from the diagram there is 1 electron.

Step4: Calculate atomic mass of Atom A

Atomic mass = number of protons+number of neutrons. So, atomic mass = 1 + 0=1.

Step5: Determine atomic number of Atom A

Atomic number is equal to the number of protons. So, atomic number = 1.

Answer:

1. 1 proton
2. 0 neutrons
3. 1 electron
4. 1 (atomic mass)
5. 1 (atomic number)