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

What happens to electrons in ionic bonds?
What is the 'Stute Fish’s motivation?
Write a paragraph at least 4-5 sentences, in English comparing the customs and traditions of a birthday or a celebration in a Spanish speaking country and your
What is the answer? Anyone help I’m asking very kindly
Radar consists of electromagnetic waves. A warplane is rendered invisible to enemy radar by applying an antireflective polymer coating. If radar waves have a fr
A bag contains 5 blue balls, 4 red balls, and 3 orange balls. If a ball is picked from the bag at random, what is the probability that it is a blue ball?Answers
In response to rapidly rising property taxes, California voters approved a statewide ballot initiative, Proposition 13, which froze property taxes regardless of
What is the answer to this question
Someone help me step by step
which of the following was an advantage from the south at the start of the Civil War