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

subtract and simplify 10 - 5 1/8
what function do third parties serve in American politics
Which sentence uses a verb that agrees with its compound subject? A. Mars or Venus is visible in the sky tonight. B. Daniel and Andrew does that dance well. C.
Bush's political philosophy was moderate. true false
Which is most likely to occur when Technology advances? Devices are designed Inventions are made Results are improved Jobs are lost
How does Bollywood have its roots in the Aryan invasion? a.) The films of Bollywood often are about the Aryan invasion. b.) Bollywood uses the caste system in
5y-3x+2=0 to y=mx+b form
if 15% is $375, how much is 5%
how do solve you do 5b/2=27.5
What happened to the prey in the early 1700s? Missing Metadata ------------ The prey population decreased and then increased. A. The prey population decreased w