nikiyah nikiyah
  • 03-09-2020
  • Chemistry
contestada

What is the mass number of an
atom which contains 21 electrons,
21 protons, and 24 neutrons?
21
66
42
45

Respuesta :

coxliberty2003
coxliberty2003 coxliberty2003
  • 14-09-2020

Answer:

66 i think

Explanation:

because i add 21+21+24=66

Answer Link

Otras preguntas

Which human-induced event would cause a decrease in the population of another species? a. Salmon are eaten by the bears who are hunted. b. The polar bear popu
What is the effect of deforestation
Why was the south so upset by lincoln's election in 1860?
write all the numbers that round to 240
Why do you think Napoleon showed interest in even his youngest soldiers?
if Robert buys a candy bar for 78 cents, how much change does he get back from a one-dollar bill?*
what is the answer to 3x10¹=
What is the difference between flat, static, dynamic, and round characters?
1. A thesaurus is best used to _____________. A. help find the meaning of a word B. help find a word that means the same or a similar definition as another word
What is a linguist? in terms of forensic.