nikiyah nikiyah

03-09-2020
Chemistry

contestada

What is the mass number of an
atom which contains 21 electrons,
21 protons, and 24 neutrons?
21
66
42
45

Respuesta :

coxliberty2003 coxliberty2003

14-09-2020

Answer:

66 i think

Explanation:

because i add 21+21+24=66

Answer Link

Otras preguntas

What is the shape of the cross section?

3/5(x-4)-1/3(2x-9)=1/4(x-1)-2

During physical activity of high intensity, your heart will beat at a percentage of its maximum rate. Which range shows the correct percentages during this typ

How to build a robot

Help me plz cant work it out

I DON’T GET THIS ONLY NEED NUMBER 6 PLEASEEE!!!!!

Rotate the axes to eliminate the xy-term in the equation. Then write the equation in standard form. a. xy + 1 = 0

3. A line passes through the point (3,3) and is parallel to the equation y = -2/3x - 2. What's the equation of the line?

what are the coordinates of E' after a dilation of 1/4 about the origin? the coordinates for E is (-2,-2).

A sample of an uranium compound is found to be losing mass gradually. Explain what is happening to the sample.please help. :,)