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 :

alry9 alry9
  • 10-06-2020

Answer:

39

Explanation:

Total protons + total neutrons = mass number

Answer Link

Otras preguntas

Which sentence uses a verb that agrees with its compound subject? A. Either those leftovers or the trashcan are causing that smell. B. A robin and a sparrow has
the term automation refers to
why was a government with three branches considered to be a compromise
igneous rock that cools very quickly when it forms may have a texture that is______and______with no visible____
Write 78 as a product of prime factors.
Which of the following insulate against the cold? carbohydrates lipids nucleic acids proteins
Solve the following equation: 156 + (7 – 3) x 7 = A. 174 B. 184 C. 1,050 D. 1,120
What made the United States a Transcontinental power in 1819? A)Adams-Onis Treaty B)Louisiana Purchase C)Monroe Doctrine D)War of 1812
Which is the most important factor in determining climate? A. longitude B. latitude C. time zone D. hours of daylight
***Please help with this*** ~Thank you :)