joesiegcorona joesiegcorona

10-06-2020
Chemistry

contestada

What is the mass number of an atom that contains 19 protons, 19 electrons, and 20 neutrons?

Respuesta :

10-06-2020

Answer:

39

Explanation:

Total protons + total neutrons = mass number

Answer Link

Otras preguntas

The lateral area of a cone is 555 pi cm^2. The radius is 15.1 cm. What is the slang height to the nearest tenth of a centimeter? A- 36.8 cm B- 11.7 cm C- 83.8 c

THE RIGHT ANSWER WILL RECIEVE A BRAINLEST AND POINTS!!! 1.) what can we do to stop wasting water? 2.) what is a possible solution 3.) what is the problem of was

When bernadette first left home to attend college, she felt lonely, isolated, and apprehensive about succeeding in her new academic environment. bernadette freq

What is the sum of 4.2 × 10^5 and 5.3 × 10^5? A 95 × 10^5 B 95 × 10^10 C 9.5 × 10^5 D 9.5 × 10^10

A grapefruit is 8% heavier than an orange, and an apple is 10% lighter than the orange. a By what percentage is the grapefruit heavier than the apple? PLS answ

What is the main of this phrase? (PLEASE ANSWER + BRAINLIEST !!!) Everyone has the right to recognition everywhere as a person before the law.

Which of these statements best describes the inhabitants of Mars as they are described in paragraph one of this excerpt? (4 points) They want to study scienc

Deadline coming up!!!! Help me please!!!!!!!! Needed desperately!!

Insurance can help you: A- minimize monthly expenses B- financially protect against unexpected accidents C- reduce the chances of getting into an accident D- c

Many historians argue that the assassination of President Abraham Lincoln changed the course of Reconstruction. Which of the following is usually cited as an

good job