atomic structure

Question 1

daltons atomic model

Answer 1

atoms of one element same, different from other elements

atoms tiny + indivisible

Question 2

Thomson’s atomic model

Answer 2

plum pudding model
sea of negatively charged electrons
in a positive atom

Question 3

Rutherford’s atomic model

Answer 3

most of mass concentrated in positive nucleus
negative electrons orbiting it
+ and - charges balance to make atom neutral

Question 4

Bohr’s atomic model

Answer 4

electrons orbit nucleus on paths

Question 5

current atomic model

Answer 5

protons, neutrons, electrons
protons + neutrons in nucleus
electrons surround central nucleus

Question 6

relative isotopic mass

Answer 6

mass of an atom of an isotope compared to

1/12 of mass of an atom of Carbon-12

Question 7

relative atomic mass

Answer 7

ratio of average mass of an atom of an element

to 1/12 of mass of an atom of carbon-12

Question 8

relative molecular mass

Answer 8

ratio of average mass of a molecule of an element/compound

to 1/12 of mass of an atom of carbon-12

Question 9

relative formula mass

Answer 9

similar to molecular mass

applies to ionic compounds