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

Which sentence has an intransitive verb? a. Please come inside the house now. b. Jordan writes poetry in his free time. c. You and Chris should clean the garage

A bookstore had 96 copies of a magazine. Yesterday, it sold 1/3 of them. Today, it sold 1/8 of what remained. How many copies does the bookstore have left?

Find the energy in joules required to lift a 55.0 megagram object a distance of 500cm

In the body of cells of most organisms oxygen is used to release what ?

Boron is ten years older than his sister. In three years, he will be twice as old as she is now. How old are they now?

if i have 2 apple and get 3 more then lose 2 how many do i have left

how did the akkadian empire form

48 gallons in 14 minutes write rate as a fraction

First two lessons : £12.75 each lesson All other lessons : £20.00 Each lesson Leah has some lessons with Stan's driving school. The total cost of lessons is £30

James weight increased in 41 to 45 kilograms. what is the percentage increase?