Question

phosphorus
atomic number
atomic mass
number of protons
number of electrons
number of neutrons
p =
n =
potassium
atomic number
atomic mass
number of protons
number of electrons
number of neutrons
p =
n =

Explanation:

Step1: Get Phosphorus base values

From periodic table: Atomic number of Phosphorus (P) = 15, Atomic mass ≈ 31

Step2: Calculate P subatomic particles

Number of Protons = Atomic Number = $15$
Number of Electrons = Protons (neutral atom) = $15$
Number of Neutrons = Atomic Mass - Atomic Number = $31 - 15 = 16$

Step3: Get Potassium base values

From periodic table: Atomic number of Potassium (K) = 19, Atomic mass ≈ 39

Step4: Calculate K subatomic particles

Number of Protons = Atomic Number = $19$
Number of Electrons = Protons (neutral atom) = $19$
Number of Neutrons = Atomic Mass - Atomic Number = $39 - 19 = 20$

Answer:

Phosphorus

Category	Value
Atomic Mass	31
Number of Protons	15
Number of Electrons	15
Number of Neutrons	16

(For the Bohr model: p = 15, n = 16; electrons: 2 in first shell, 8 in second, 5 in third)

Potassium

Category	Value
Atomic Mass	39
Number of Protons	19
Number of Electrons	19
Number of Neutrons	20

(For the Bohr model: p = 19, n = 20; electrons: 2 in first shell, 8 in second, 8 in third, 1 in fourth)