Question

the correct symbol for the isotope of potassium with 22 neutrons is
15 37 p.
22 19 k.
37 15 p.
19 41 k.
41 19 k.
question 4 (1 point)
the atomic number of an atom is equal to the number of
neutrons.
neutrons plus protons.
nuclei.
protons.
electrons plus protons.
question 5 (1 point)
the mass number of an atom can be calculated from
the number of neutrons.
the number of protons plus neutrons.

Explanation:

Step1: Recall potassium's atomic number

Potassium (K) has an atomic number of 19, which is the number of protons.

Step2: Calculate mass - number

Mass number = number of protons + number of neutrons. Given 19 protons and 22 neutrons, mass number = 19 + 22=41.

Step3: Write isotope notation

Isotope notation is $\ce{^{A}_{Z}X}$, where A is mass number, Z is atomic number and X is the element symbol. For potassium (K) with Z = 19 and A = 41, the notation is $\ce{^{41}_{19}K}$.

Step4: Recall atomic - number definition

The atomic number of an atom is equal to the number of protons.

Step5: Recall mass - number calculation

The mass number of an atom can be calculated from the number of protons plus neutrons.

Answer:

Question 3: $\ce{^{41}_{19}K}$
Question 4: protons
Question 5: the number of protons plus neutrons