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 difference between the square root of c and pi squared ? ( Algebraic expression plz )

If the volume of a rectangular prism is 200 cubic units, and the area of the base is 16 square units, what is the height of the prism?

Ripped or torn,contamination, starting a new task these are all situations when an employee must

Write an explicit rule and recursive rule for a geometric sequence with a second term of 6 and a third term of 12.

What is the scale factor of this dilation? A) 1/2 B) 1/3 C) 2 D) 3

The active ingredient in the first toothpaste approved by the ada was _______________.

I need help with this question please

The probability of a certain spinner landing on yellow is 2/3. If you spin this spinner 45 times how many times would you expect the spinner to land on yellow?

A relationship based on need is called ?

math algebra Please help pick the best answer please