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

why is an objects density expressed as a combination of two units

The ratio of the number of boys to the number of girls in a school is 5:7.If there are 600 students in the school,how many girls are there?

What is the function of the verbal in the sentence? My goal is to skydive over the Grand Canyon. It is used as a noun. It is used as a verb. It is used as an ad

how is the volume of the cone related to the volume of the cylinder

can you answer number six please

what is 12.09 and 9.88 rounded to the nearest hundreth

substitution method- r = -3s r= 10 - 4s

The streams and smaller rivers that feed into a main river are its (blank)?

Austin shops at Surfer Joe,'s surf shop before going to the beach. He buys 2 shirts, a pair of board shorts, and a towel. If he gives the cashier $60, how much

The leader of the Mongols is called what