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

PLEASE HELP LIMITED TIME!!!!!! A person mostly likely reads an expository essay to ____. Select one: understand facts or details about a topic. validate their o

What is the function of the meiosis cell division?

Which of the following statements about the structure of an atoms TRUE? A.the number of protons is always equal to the number of neutrons in the nucleus of the

A swing set needs repair. The support bar that is at the middle of the A-frame is failing and must be replaced. An image of a swing set is shown with triangle S

Which of the following is a cause of economic problem? A.Scarcity of Resources B.Unlimited Wants C.Alternatives Uses D.All of the above

which of the following means the arrest of heart contraction as may be induced by chemicals during surgery? A.Cardioplagia B.lyphostatis C.myocardial infraction

which author had the most titles on a single new york times best-seller list in 2022?

Subtract and reduce to lowest terms. 3 3/7 - 2 1/5= 1 1/8 1 1/35 1 4/17 None of these choices are correct.

What is the equation of the line that passes through (-3,-1) and has a slope of 3/5 Put your answer in slope-intercept form.

an object spring system moving with simple harmonic otiojn has an amplitude a what is the total energy of the system in terms of k and a only