Moisesp345
Moisesp345
02-10-2020
Chemistry
contestada
What is the mass number of the atom shown?
Respuesta :
legoshes
legoshes
02-10-2020
Answer:
21
Explanation:
Formula;
Mass number = number of protons + number of neutrons
= 9 + 12
= 21
Answer Link
VER TODAS LAS RESPUESTAS ( 92+ )
Otras preguntas
the population of the former Soviet Republic is falling due to illness and fewer people having children. how would technology most likely be useful to the forme
What was the main religion in Africa during the era of exploration ? A.Christianity B.buddhism C.islam
Which of these was an opinion held by opponents to the Constitution in 1787? a The Constitution gave the state government's too much power b The Articles of
One leg of a right triangle is 7 inches longer than the smaller leg and the hypotenuse is 8 inches longer than the smaller leg. Find the lengths ofl the side o
write a real world problem that involves a classifying a quadilateral.
A local grocery store tested spinach samples for E coli bacteria using two different tests. The first test has a 94% probability of giving accurate results, whi
Stephanie ran four laps around the school track in 7 minutes and 30 seconds how many seconds per lap is that
A meteor is approaching Earth. Which statement about its motion is true? a.The meteor travels upward relative to Earth. b.The meteor accelerates. c.The meteor
Izzy was running up the street. She ran 2.35 and her friend Ozzie ran 2.45. Can you add these decimals?
The South was against tariffs because it feared that tariffs would hurt its foreign trade. True False
