2.1.2 Atomic Structure and Isotopes

Question 1

what is a isotope

Answer 1

atom of the same element with the same number of protons but different number of neutrons and masses

Question 2

mass of an electron

Answer 2

negligible
1/1836 mass of proton

Question 3

mass number

Answer 3

number of protons add number of neutrons

Question 4

atomic number

Answer 4

number of protons

Question 5

what are cations

Answer 5

positive ions with fewer electrons

Question 6

what are anions

Answer 6

negative ions with more electrons

Question 7

relative isotopic mass

Answer 7

mass of an isotope compared to 1/12th of the mass of an atom of Carbon-12

Question 8

relative atomic mass

Answer 8

weighted mean mass of an atom of an element compared to mass of an atom of Carbon-12

Question 9

what does weighted mean mass take account for

Answer 9

percentage abundance of each isotope
relative isotopic mass of each isoptope

Question 10

how do you find percentage abundance of isotopes

Answer 10

using mass spectrometer

Question 11

polyatomic ions

Answer 11

contain atoms of more tahn one element bonded together