An isotope with 8 protons, 9 neutrons, and 8 electrons would have which symbol? a) 16f b) 16o c) 17f d) 17o

 D.

Explanation: Atomic number is the number of protons or the number of electrons.

Mass number is the sum of number of protons and number of neutrons.

Atomic number = number of electrons= number of protons = 8

Mass number = number of protons + number of neutrons= 8+9= 17

The representation of element is :

where Z= atomic number, A= mass number , X= chemical symbol of element

The representation of the element with atomic number 8 and mass number 17 is :  .

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.