Ch. 2 Structure of the Atom

Question 1

the idea that electromagnetic radiation exhibits properties of both a wave and a particle is called

Answer 1

wave-particle duality

Question 2

value of the speed of light

Answer 2

3x10^8 m/s; 186,000 miles/sec

Question 2

positively charged beta particle

Answer 2

positron

Question 3

value of planks constant

Answer 3

4.135x10^-15 eV sec; 6.626x10^-34 J sec

Question 4

developed the electromagnetic theory

Answer 4

James Maxwell

Question 5

what is difference in mass called

Answer 5

mass defect

Question 6

filament electron gets attracted to the nucleus and breaks or slows down and changes direction, resultant loss of energy creates what kind of photon

Answer 6

Brehms

Question 7

atomic mass number symbol

Answer 7

A superscript

Question 8

what are neutrons and protons held together in the nucleus by

Answer 8

nuclear binding energy

Question 9

a molecule that contains at least 2 different elements

Answer 9

compound

Question 10

atomic number symbol

Answer 10

Z subscript

Question 11

different atomic structures absorb differently known as

Answer 11

differential absorption

Question 12

electron from filament electron stream knocks out the k-shell electron from the Tungsten

Answer 12

characteristic radiation

Question 13

the reason we filter is due to what

Answer 13

brehms photons

Question 14

what is the very last shell in an atom called

Answer 14

valence shell

Question 15

formula to determine max number of electrons that will fit in an electron shell

Answer 15

2n^2

Question 16

the ebe of the k-shell electron of Tungsten

Answer 16

69.5 keV

Question 17

what are electrons held in their orbits by

Answer 17

electron binding energy

Question 18

provided one of the most detailed and elaborate theories; credited with expanding and formalizing the earliest atomic theory

Answer 18

Democritus of Abdera

Question 19

discovered the electron and described the atom as a positive charged sphere with negatively charged electrons embedded in it

Answer 19

Joseph John (J.J) Thomson

Question 20

who organized the known elements into the periodic table

Answer 20

Dmitri mendeleev

Question 21

describes the atom as having 3 fundamental components - electron, proton, and neutron; brought us to the theory and model of the atom we are most familiar with

Answer 21

Niels Bohr

Question 22

Created a model of the atom which resembled a tiny version of our solar system; experimented with scatter radiation

Answer 22

Ernest Rutherford

Question 23

developed atomic theory based on scientific evidence; recognized that elements combine in definite proportions to form compounds; theorized compounds were formed from molecules, molecules by fixed ratios of constituent atom types, also that chemical reactions were a rearrangement of atoms

Answer 23

John Dalton