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

The volume of the water in the graduated cylinder rose as some of the water was displaced by the golf ball. Find the volume of the ball using the formula

A person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed

Is the text below an example of 1st person point of view or 3rd person point of view? I feel awful. I think I'll lie down for a while. I hope I wake up feeling

Solve in detail plzzzzz

1.if you had to come up with a nonprofit, it would be called? 2.the purpose of my nonprofit would be? 3.the reason this would be my nonprofit is?

How do immigrants increase diversity in the United States

The diameter of a circle is 7 in. Find its area to the nearest tenth.

What does it mean if data are reproducible but not accurate? O The data can be produced over and over but are not close to the accepted value. O The data are cl

Anna's salary is four times Emily's salary. They decide to share the cost of a $120 gift card. Anna will contribute four times as much as Emily. How much does e

4∣3c+5∣=16c I know the answer is five but I don't know how to get there