Shanae771 Shanae771
  • 05-06-2015
  • Chemistry
contestada

What is the total number of protons in the nucleus of an atom of potassium-42?
(1) 15 (3) 39
(2) 19 (4) 42

Respuesta :

stephenlee0912 stephenlee0912
  • 05-06-2015
The answer is (2) 19. The number of protons of any isotope of a given element is just its atomic number (because the number of protons identifies the element). Potassium's atomic number is 19.
Answer Link

Otras preguntas

The last 2 photos i took for my photography class what do you all think? (like i said before he wants us to submit as many photos as we can and i had these but
Shayna is following a very strict meal plan. The meal plan includes 2 Tbsp of peanut butter on whole wheat bread with a banana. Two tablespoons of peanut butter
Find the exact value of the given angle. Simply all radicals and rationalize all denominators.
Matching Parts of Speech
3) The probability that Max does not bring his calculator to Maths lesson is 0.2. Complete the tree diagram for two successive lessons.
In the diagram ABC = AFGD. Complete each statement.
The figure you get after a transformation has been performed is called a/an.............
help plssssssssssssssss
find the circumference
On June 22, how much daylight is received by locations in the Arctic Circle?