2.1.1 Atomic structure and Isotopes

Question 1

atoms consist of what 3 subatomic particles?

Answer 1

protons, neutrons and electrons

Question 2

what hold electrons in place?

Answer 2

an attraction

Question 3

what are nuclides?

Answer 3

where the atomic and mass numbers of an atom are specified

Question 4

how do you find the number of electrons in a negative ion?

Answer 4

add the charge to the number of electrons

Question 5

how do you find the number of electrons in a positive ion?

Answer 5

subtract the charge from the number of electrons

Question 6

What do you call atoms and ions that have the same number of electrons?

Answer 6

isoelectronic

Question 7

what is an isotope?

Answer 7

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

Question 8

how do you define the relative atomic mass?

Answer 8

the relative atomic mass for an element is the weighted mean mass of an atom of the element compared with 1/12th mass of an atom of carbon-12, which has a mass of 12

Question 9

how do you define the relative isotopic mass?

Answer 9

the relative isotopic mass for an isotope is the mass of an isotope compared 1/12th mass of an atom of carbon-12, which has a mass of 12

Question 10

what is the equation for relative atomic mass?

Answer 10

                       100 (or total abundance is known)

Question 11

what does it mean if an answer of relative atomic mass is closer to one number than another?

Answer 11

the number that it is closest to is the most abundant isotope