Quiz #1 + Unit 1 test

Question 1

What is chemistry?

Answer 1

The study of composition, properties, and reactions to matter

Question 2

Who thought of the atom?

Answer 2

Democritus

Question 3

What did Democritus do?

Answer 3

He thought of the atom and named it.

Question 4

Who proved the existence of atoms?

Answer 4

Dalton

Question 5

What did Dalton do?

Answer 5

He proved the existence of atoms, conducted gas experiments, and created the solid sphere model.

Question 6

Who discovered electrons?

Answer 6

Thomson

Question 7

What did Thomson do?

Answer 7

He discovered electrons, conducted the cathod ray tube experiment, and created the plum pudding model

Question 8

Who discovered that there are protons in the nucleus?

Answer 8

Rutherford

Question 9

What did Rutherford do?

Answer 9

He discovered that there are protons in the nucleus, conducted the gold foil experiment, and created the planetary model.

Question 10

Who discovered neutrons?

Answer 10

Chadwick

Question 11

What did Chadwick do?

Answer 11

He discovered neutrons, conducted the wax/oil experiment, and updated the planetary model

Question 12

How do you calculate the number of electrons?

Answer 12

Atomic # - Charge

Question 13

How do you calculate the number of protons?

Answer 13

The atomic #

Question 14

How do you calculate the number of neutrons?

Answer 14

Mass # - Atomic #

Question 15

What is an ion?

Answer 15

An atom with a different number of electrons

Question 16

What is a cation?

Answer 16

A positive ion

Question 17

What is an anion?

Answer 17

A negative ion

Question 18

What is the preferred charge of elements on the periodic table?

Answer 18

+1, +2, ???, +3, can’t say, -3, -2,-1, 0.

Question 19

What did Plank do?

Answer 19

Discovered the emission spectrum and that energy comes in the form of photons, or “light packets.”

Question 20

What did Einstein do?

Answer 20

He validated Planck by modeling that frequency of light, not strength or brightness of light, resulted in the emission of light.

Question 21

What did Bohr do?

Answer 21

He proposed that when the electrons move energy levels, photons are emitted.

Question 22

What did De Broglie do?

Answer 22

He discovered that electrons can behave as a particle or a wave, and so electrons can also be described as having a “dual nature.”

Question 23

What did Heisenberg do?

Answer 23

He proved that you cannot know an electron’s location and speed at the same time. This is known as the Heisenberg uncertainty principle.

Question 24

What is the Heisenberg Uncertainty Principle?

Answer 24

That you can’t exactly know an electron’s location and speed at the same time.

Question 25

What did Schrodinger do?

Answer 25

He created a mathematical model for the electrons wave nature

Question 26

What did Fermi do?

Answer 26

He created a statistical analysis of electrons and their location

Question 27

What is the Bohr model?

Answer 27

A model that shows that electrons can be located I n specific energy levels, and movement between these energy levels results from the absorption or emission of energy

Question 28

What are orbitals?

Answer 28

A probability map of where elections are

Question 29

What is the Aufbau Principle?

Answer 29

Electrons fill orbitals starting at the lowery energy sub level before filling higher levels.

Question 30

What is Hund's rule?

Answer 30

That unoccupied orbitals will be filled before occupied orbitals are reused.

Question 31

What is Pauli's exclusion principle?

Answer 31

That two electrons occupying an orbital must have an opposite spin

Question 32

What are orbital diagrams?

Answer 32

The diagram with the arrows, numbers, and letters.

Question 33

What is electron configuration?

Answer 33

The model with numbers and letters, but not arrows.

Question 34

What is abbreviated electron configuration?

Answer 34

Also known as noble gas configuration, it uses the noble gas that comes before it to shorten the notation.

Question 35

What does isoelectric describe?

Answer 35

It describes two different atomic species (atoms or ions) that have the same number of electrons

Question 36

What are exceptional electron configurations?

Answer 36

When the outer D sub-level takes an electron from the nearest S sub-level. Only happens when the D sub-level has either 4 or 9 electrons.

Question 37

What are excited electron configurations?

Answer 37

When an electron is found out of order (Ex: 1S2 3S1 2S1)