Chapter 5/6

Question 1

Heisenberg

Answer 1

Uncertainty principle – it is impossible to know the exact location and motion of an electron at the same time

Question 2

Schrodinger

Answer 2

Wave equation that when solved gives the likely location of electrons
Gives a set of probabilities known as quantum numbers
Found electron cloud model

Question 3

Einstein

Answer 3

Explained photoelectric effect – when light of certain frequencies is shined on a metal the metal ejects an electron

Question 4

Other names for quantum number

Answer 4

Energy level, principal quantum number, first quantum number

Question 5

Pauli exclusion principle

Answer 5

If one electron is spinning clockwise, the other is spinning counterclockwise

Question 6

Wavelength

Answer 6

Difference between crests

Question 7

Frequency

Answer 7

Number of wave crests that pass a certain point every second

Question 8

Wavelength and frequency are blank related

Answer 8

Inversely

Question 9

Frequency and energy are blank related

Answer 9

Directly

Question 10

Wavelength and energy are blank related

Answer 10

Inversely

Question 11

Which rays have the highest energy

Answer 11

Gamma rays

Question 12

Which waves have the lowest energy

Answer 12

Radio waves

Question 13

Dobreiner

Answer 13

Organized elements into triads

Question 14

Newlands

Answer 14

Organized elements into octaves based on weight

Question 15

Mendeleev

Answer 15

Organized elements based on atomic weight
left blank spaces
predicted chemical and physical properties

Question 16

Mosely

Answer 16

Arranged periodic table by numbers of protons

Question 17

Periodic law

Answer 17

Elements are arranged by increasing atomic number, there is periodic repetition in their physical and chemical properties

Question 18

Group a elements

Answer 18

Representative

Question 19

Group B elements

Answer 19

Transition elements

Question 20

Metals

Answer 20

Lustrous, malleable, ductile, conductors, form cat ions, mostly solid

Question 21

Non metals

Answer 21

Dull, brittle, nonconductors, many are gases, form anions

Question 22

Metalloids

Answer 22

Known as semimetals, characteristics of metals and nonmetals, shiny but brittle, semi conductors

Question 23

Atomic radius

Answer 23

Distance from center of the nucleus of one Atom to the nucleus of another

Question 24

Ionization energy

Answer 24

Energy required to overcome attraction of nuclear charge and remove an electron to form an ion

Question 25

Electronegativity

Answer 25

The ability for atoms to attract electrons when they are chemically combined with another element

Question 26

Planck

Answer 26

And electron in an Atom is only allowed to have certain amounts of energy