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 ( 28+ )
Otras preguntas
1: There were 439 bees in the hive to start. Some more flew In. Now there are 646 bees in the hive. How many bees flew in?
Area model of 1/2 times 1/3
A race car travels in a straight line from the starting line to the finish line in 12.0 seconds. The race car accelerated from a stopped position to 90 m/s by t
A car travels 120 miles in 3 hours (with a constant speed) How long will it take to travel 200 miles?
A race car travels in a straight line from the starting line to the finish line in 12.0 seconds. The race car accelerated from a stopped position to 90 m/s by t
A ______ is placed above the size indicator of a unit symbol to show that it is task-organized for a specific mission or operation.
is global warming real?
Can someone help me with this math question plsss it would mean alot :D! (LOTS OF POINTS!!!!!!!!!!)
Let f(x)=9+2x and g(x)=x^2-3x+4. Find g(3) + f(1).
How are the intermolecular interactions represented differently in the solid model and the gas model why?
