somekid123 somekid123

29-10-2017
Chemistry

contestada

A neutral atom of potassium (K) has an average mass of 39 amu and 19 electrons. How many neutrons does it have?

10
19
20
58

Respuesta :

mreneea44 mreneea44

29-10-2017

Answer is 20. Since potassium has 19 electrons you know that it then has 19 protons because there is no charge change. So to get the number of neutrons, you take the average mass of 39 and subtract the number of protons and that leaves you with 20 neutrons.

Answer Link

ccarter2025 ccarter2025

01-04-2021

Answer:

20

Explanation:

Took the quiz

Answer Link

Otras preguntas

Is the regulation of glucose an example of positive feedback or negative feedback? Explain

A graduate nurse reminds the client who just had a laryngoscopy not to take anything by mouth until instructed to do so what conclusion should be made by this i

The first step in the five-step process for problem solving is to ____.

Alicia borrowed $15,000 to buy a car. She borrowed the money at 8% for 6 years. What is the interest rate she will pay for the loan? I am terrible at this and

Shakespeare help needed!!!!!!!!!!Brutus: Who is here so base that would be a bondman? if any, speak;for him have I offended. Who is here so rude that would not

Here, q is tile sales (in thousands of cases), p is tile price (per case), a is advertising expenditures (in thousands of dollars), i is disposable income per h

How must each transaction be recorded in the double-entry system? a : in at least two different accounts b : as a revenue first and then as an expense

Which is the least dense? 1000 g of water 1000 g of feathers 1000 g of concrete 1000 g of mercury

Using the quadratic regression equation predict what your stopping distance would be if you were going 80 miles per hour. a. 363.2 ft b. 412.8 ft c. 355.2 ft d.

The si unit used to measure the amount of many tiny substances is?

ACCESS MORE EDU ACCESS