RudleyMillia RudleyMillia

12-10-2016
Chemistry

contestada

What is the total number of neutrons in the nucleus of a neutral atom that has 19 electrons and a mass of 39?
a. 19
b.20
c.39
d.58

Respuesta :

olabido olabido

18-06-2018

20 because
mass no=electrons+neutrons
so to find neutrons
mass no-electrons=neutron

Answer Link

Otras preguntas

Which diagram shows a 90 degree angle?

How does light function as a symbol in this section? How has that symbol changed, even if slightly (frankenstein ch. 11-13)

is iceland or ireland warmer

What is twenty-one - eighteen?

A 76.4 g piece of metal at 82.0°C is placed in 119 g of water at 20.0°C contained in a calorimeter. The metal and water come to the same temperature at 23.4°C.

could anyone help me please and show the work please

Please help this is the last questionnnn

Sarah has a bag of 50 rubber bands in different colors. She pulls out a rubber band, records its color, and then puts it back into the bag. Sarah records 4 bro

A car travels 120 miles in 3 hours (with a constant speed) How long will it take to travel 200 miles?

Different beverages may be absorbed at slightly different rates because of __________. The drink's chemical make-up The drink's size The drinker's size The