OSAT Chemistry Practice Questions - Oklahoma Subject Area Test Chemistry (104) Exam

An atom has 19 protons, 20 neutrons, and 18 electrons. Which statement is correct?

It is a neutral argon atom with mass number 38. It is a potassium ion with a +1 charge and mass number 39. It is a calcium ion with a -1 charge and mass number 39. It is a potassium isotope with a -1 charge and mass number 37.

Correct Answer:

It is a potassium ion with a +1 charge and mass number 39.

Access more questions from this quiz

Continue to OSAT Chemistry Practice Questions - Oklahoma Subject Area Test Chemistry (104) Exam for more practice questions and the full quiz experience.

Access More Questions