nessm6214 nessm6214
  • 04-03-2022
  • Chemistry
contestada

An atom of a mystery element contains 7 protons, 7 neutrons, and 7 electrons.
What is the mass number?
A. 14
B. 7
C. 0
D. 21

Respuesta :

ROYADE
ROYADE ROYADE
  • 05-03-2022

A-14

Explanation:

Mass number (MN) = Proton number + Neutron number

MN=7+7

MN=14

Answer Link

Otras preguntas

Susan is using rope to make doormats she uses 48 inches of rope to make each doormat how many complete doormats can she make with 10 feet of rope?
Your record bicycle pace along a favorite trail is 16 mph. On a recent ride, you traveled the 25 mile route in a time of 90 minutes. What was your average speed
who were the main characters for the book the perfect season
Who is the antagonist in To Kill a Mockingbird?
SIMPLE MATH WORD PROBLEM!! PLEASE HELP!!
A fire truck and an ambulance each drive along a straight road between two points. Using the points on a map that the city created, the fire truck will start at
What role does speciation play in Evolution
Pick the description of the line x + 3y=1 ? It vertical or horizontal?
¿Qué me recomiendas que conozca? A. Te recomiendo que conozcas la plaza. B. Te recomiendo que conocer la plaza. C. Te recomiendo que conozco la plaza.
Can someone please give me an example of a displacement reaction using an ionic equation ??