kevlazo789 kevlazo789

04-09-2017
Chemistry

contestada

An atom of potassium has 19 protons and 20 neutrons. what is its mass number?

Respuesta :

Tefnut09 Tefnut09

29-09-2021

Answer:

39

Explanation:

Mass number = Number of protons + number of neutrons

Therefore,

19 + 20 = 39

Answer Link

Otras preguntas

A dynamic whereby people who disagree with opinions in the mass media are less likely to voice their views.

When reduced to its lowest terms, the fraction 12/16 would read as

Early in the Industrial Revolution, why did many employers want to hire women and children rather than men to work in factories? A. Men were farmers and did

Why are there are more ways for companies to advertise to us than ever before?

4. What is eco-tourism?

The long-run supply curve for a competitive industry may be upward sloping if a. firms that enter the industry are able to do so at lower average total costs th

8. Find the function rule. x : -2 | -1 | 0 | 1 | 2 | y : 9 | 4 | -1 | -6 | -11

In the fourth paragraph, Churchill offers a “resolution” to the House of Commons in parliament to “record its approval of the steps taken and declare its confid

Help me out with this please

Determine the rotational period of Saturn in earth years