Question

ions, and isotopes review quiz
which of the following statements are true regarding this atom?
□ there are 4 protons
□ there are 5 neutrons
□ there are 2 electrons
□ this atom has as mass number of 9

Explanation:

Step1: Identify protons

Count red - positively charged particles in nucleus. There are 4 protons.

Step2: Identify neutrons

Count blue - neutral particles in nucleus. There are 5 neutrons.

Step3: Identify electrons

Count green - negatively charged particles in orbits. There are 4 electrons.

Step4: Calculate mass number

Mass number = protons + neutrons. So 4 + 5=9.

Answer:

there are 4 protons
there are 5 neutrons
this atom has a mass number of 9