Inorganic Chemistry

Question 1

Postulated that all matter is made up of atoms

Answer 1

Democritus

Question 2

Atomic Theory
I. Each atom is made up of atoms
II. Atoms of a given element are identical
III. Compounds are formed when atoms combine with each other
IV. Chemical reactions involve reorganization of tha atoms

Answer 2

John Dalton

Question 3

Discovered that the properties of elements were periodic functions of their atomic weights

Answer 3

Dmitri Mendeleev

Question 4

Proposed the Theory of Electromagnetism

Answer 4

James Clerk Maxwell

Question 5

Proposed that the electricity was made of electrons

Answer 5

George Stoney

Question 6

Made experiments with cathode ray tubes demonstrating that cathode rays have a negative charge

Answer 6

Sir William Crooke

Question 7

Used cathode ray tubes to study canal rays

Answer 7

Eugene Goldstein

Question 8

Discovered X-rays

Answer 8

Wilhelm Roentgen

Question 9

Radioactivity in Uranium

Answer 9

Henri Bequerel

Question 10

Used cathode ray tubes to determine the charge to mass ratio of an electron

Answer 10

Sir Joseph John Thomson

Question 11

Discovered Alpha, Beta and Gamma Rays in radiation

Answer 11

Ernest Rutherford

Question 12

They discovered the radioactive elements Polonium and Radium

Answer 12

Pierre and Marie Curie

Question 13

Proposed the idea od quantization to explain how hot, glowing object emitted light

Answer 13

Max Planck

Question 14

Discovered that there appeared to be more than one element at each position on the periodic table

Answer 14

Frederick Soddy

Question 15

Coined the term Isotope

Answer 15

Margaret Todd

Question 16

Found that noble gases have stable electron configuration

Answer 16

Richard Abegg

Question 17

Created theories of relativity abd hypothesized about the particle nature of light

Answer 17

Albert Einstein

Question 18

Invented a device that could detect alpha particles

Answer 18

Hans Geiger

Question 19

Determined the charge of an electron through his oil drop experiment

Answer 19

Robert Millikan

Question 20

Established that the nucleus was very dense, very small and positively charged

Answer 20

Ernest Rutherford

Question 21

Discovered that the number of protons in an element determines its atomic number

Answer 21

Henry Moseley

Question 22

Developed the Bohr atomic model, with electrons travelling in orbits around the nucleus

Answer 22

Niels Bohr

Question 23

Proposed that electrons have a wave-particle duality

Answer 23

Louis de Broglie

Question 24

Developed the Schrödinger equation which describes how the quantum state of a system changes with time

Answer 24

Erwin Schrödinger

Question 25

All matter is composed of atoms

Answer 25

Dalton’s Billiard Ball Model

Question 26

The atom is made up of negative electrons that float in a sphere of positive charge

Answer 26

Thomson’s Plum Pudding Model

Question 27

Result of the well-known gold foil experiment. The atom has a tiny, heavy nucleus.

Answer 27

Rutherford’s Nuclear Model

Question 28

Atoms as small, positively charged nuclei surrounded by electrons in circular orbits.

Answer 28

Bohr’s Planetary Model

Question 29

Number of protons in the nucleus

Answer 29

Atomic Number (Z)

Question 30

Sum of the number of protons and neutrons in the nucleus.

Answer 30

Mass Number (A)

Question 31

Same element, differ in the number of neutrons.

Answer 31

Isotopes

Question 32

Same number of neutrons

Answer 32

Isotones

Question 33

Same Mass Number

Answer 33

Isobar

Question 34

Same number of electrons

Answer 34

Isoelectronic

Question 35

Energy required to remove an electron from a gaseous atom in its ground state

Answer 35

Ionization Energy

Question 36

Energy change associated with the addition of an electron

Answer 36

Electron Affinity

Question 37

Tendency of an atom or a functional group to attract electrons

Answer 37

Electronegativity

Question 38

proposed the Law of Triads

Answer 38

Johann Dobereiner

Question 39

Proposed the Law of Octaves. Every eight element shares similar properties.

Answer 39

John Newlands

Question 40

Recognized the periodic behavior among elements.

Answer 40

Lothar Meyer

Question 41

Formulated the Periodic Law

Answer 41

Dmitri Mendeleev

Question 42

Completely consumed in the reaction and determines the amount of product that can be formed.

Answer 42

Limiting Reactant

Question 43

Not completely used up in the reaction

Answer 43

Excess Reactant

Question 44

Ratio of actual and theoretical yield

Answer 44

Percentage Yield

Question 45

``` 1 Lyman Series 2 Balmer 3 Paschen 4 Brackett 5 Pfund 6 Humphreys ```

Answer 45

Energy Levels