1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anna35 [415]
3 years ago
11

All atoms of the element potassium have 19 protons. One of the most stable types of potassium atoms has the mass number 39. How

many neutrons make up one of these potassium atoms? 19 20 38 58
Physics
2 answers:
Deffense [45]3 years ago
4 0

The correct answer is 20 neutrons

ozzi3 years ago
3 0
The formular for determinatio of mass number is this:
Mass number = number of proton + number of neutron
From the question, we are told that:
Mass number = 39
Proton number = 19
Number of proton = ?
Number of neutron = mass number -  number of proton
Number of neutron= 39 - 19 = 20
Therefore, number of neurtron = 20. 
You might be interested in
40 POINTS
prohojiy [21]

Answer:

C

Explanation:

this is because i need more space

7 0
2 years ago
Read 2 more answers
What is the differece between force and motion?​
Jobisdone [24]

Answer:

---

Explanation:

Force is like the amount of push

Motion is the result of Push

6 0
2 years ago
Read 2 more answers
• List four uses of the concave mirror.<br> State five uses of lenses in everyday activities
Zina [86]
FOUR USES OF CONCAVE MIRROR:Satellite dishes,headlights of a car, telescopes used for astronomical studies, and shaving mirrors because of there curved and reflective surface.

FIVE USES OF LENSES: Camera lens ,microscopes ,magnifying glass,eyeglasses,projector
6 0
2 years ago
What is the average speed of a race car that moved 20 kilometers in 10 minutes?
Nadya [2.5K]

Answer:21

Explanation:every body said

8 0
3 years ago
When heating water, during what temperature range will the temperature cease to change for some time?
fgiga [73]
The correct answer would be B.) 98°c-102°c
7 0
3 years ago
Read 2 more answers
Other questions:
  • A steam pipe for a 300-m-tall building receives superheated steam at 200 kPa at ground level. At the top floor the pressure is 1
    15·1 answer
  • A ferris wheel of radius 100 feet is rotating at a constant angular speed Ï rad/sec counterclockwise. using a stopwatch, the rid
    7·1 answer
  • A long, straight, cylindrical wire of radius R carries a current uniformly distributed over its cross section.
    9·1 answer
  • Water is said to travel from the roots of a tree to the uppermost branches via capillary action. assuming that the smallest capi
    6·1 answer
  • A mass of 9.2 kg is accelerated at 2.1 m/s2. What is the force?
    11·1 answer
  • Explain how a Faraday motor works, please. Help me out
    5·1 answer
  • Help plz I’ll give you the brainlist
    7·1 answer
  • Difference between relating velocity and angular velocity?​
    8·1 answer
  • The unit of area is a derived unit. Why?
    5·1 answer
  • Does gravitational potential energy increase when getting closer to planet universal gravitation law.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!