chapter 2 - nuclear atom

Question 1

relative charge of proton

Answer 1

+1

Question 2

relative mass of proton

Answer 2

1

Question 3

relative charge of electron

Answer 3

-1

Question 4

relative mass of electron

Answer 4

5 x 10^-4

Question 5

what holds an atom together

Answer 5

the electrostatic attraction between the positive nucleus and the negatively charged electrons orbiting around it

Question 6

what is the atomic number

Answer 6

the number of protons in the nucleus of an atom= n of electrons

Question 7

what is mass number

Answer 7

the total number of protons + neutrons in the nucleus of an atom

Question 8

what are isotopes

Answer 8

different atoms of the same element that contain the same number of protons and electrons but a different number of neutrons

Question 9

how to find relative atomic mass

Answer 9

(% abundanceA x massA) + (% abundanceB x massB) / 100

Question 10

how can the percentage abundance of isotopes in an element be found

Answer 10

use of a mass spectrometer

Question 11

processes of mass spectrometry

Answer 11

viad
sample vaporised
sample ionised to form positive ions
ions accelerated
each ion produces signal that is detected as a mass to charge ratio