Register

(This is for science, not physics.) A neutral atom of potassium (K) has an average mass of 39 amu and 19 electrons. How many neutrons does it have? A) 10 B) 19 C) 20 D) 58

(This is for science, not physics.) A neutral atom of potassium (K) has an average mass of 39 amu and 19 electrons. How many neutrons does it have? A) 10 B) 19 C) 20 D) 58
asked 169k views
1 vote
(This is for science, not physics.)

A neutral atom of potassium (K) has an average mass of 39 amu and 19 electrons. How many neutrons does it have?

A) 10
B) 19
C) 20
D) 58

asked
User SlashJ
by
8.0k points

2 Answers

4 votes
The answer would be B, 19 protons. Hope this helps!
answered
User Alaric
by
8.8k points
3 votes
  The average mass of potassium is 39 amu and 19 electrons. 19 electrons mean there have to be 19 protons. 39-19=20. Therefore potassium has 20 neutrons. The answer is C, 20.
answered
User Taher Chhabrawala
by
7.9k points
← Prev Question Next Question →

No related questions found

Ask a Question
Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.

Categories

Other Questions

At sea level, water boils at 100 degrees celcius and methane  boiled at -161 degrees celcius. Which of these substances has a stronger force of attraction between its particles? Explain your answer
Physical properties of minerals graphic organizer
A snowball is launched horizontally from the top of a building at v = 16.9 m/s. If it lands d = 44 meters from the bottom, how high (in m) was the building?
Link Copied!