Exam 1

Question 1

What is the SI unit of temperature

Answer 1

Kelvin

Question 2

What is temperature?

Answer 2

Measure of average kinetic energy

Question 3

Which way does temperature move?

Answer 3

Hot to cold

Question 4

What are derived units?

Answer 4

Combinations of units (m^3,g/cm^3)

Question 5

What is energy?

Answer 5

The capacity to do work

Question 6

What is work?

Answer 6

The action of a force with DISTANCE, ENERGY WITH DISTANCE

Question 7

How to calc total energy?

Answer 7

Potential + Kintetic

Question 8

Define matter

Answer 8

Anything which occupies space and BOTH has mass

Question 9

Define chemistry

Answer 9

The science that seeks to understand the properties of matter by studying the structure of the particles which compose it

Question 10

Define heterogenous mixture

Answer 10

One where composition varies from one region to the other

Question 11

Define compound

Answer 11

Two or more elements in fixed proportions

Question 12

Define purse substances

Answer 12

Only made of one type of particle

Question 13

What is the law of conservation of mass

Answer 13

In a reaction matter is neither created nor destroyed

Question 14

What is scientific law

Answer 14

A brief statement which summarizes past observations and predict future ones

Question 15

What is a scientific theory

Answer 15

Not WHAT but WHY

Question 16

What is a chemical reaction

Answer 16

Is when one or more substances are converted into one or more substances

Question 17

Mass of reactants =

Answer 17

Mass of products

Question 18

law of definite proportions

Answer 18

All samples of a given compound have the same proportions of their constitute elements

Question 19

law of multiple proportions

Answer 19

PLS FIND

Question 20

T/F Elements are composed of indestructible particles called atoms

Answer 20

True

Question 21

T/F Atoms combine in simple, whole number ratios to form compounds

Answer 21

True

Question 22

T/F Atoms of one element can change into atoms of another element

Answer 22

False, Atoms can only change their bonds with other atoms

Question 23

T/F All atoms of certain element have the same mass that distinguish from other elements

Answer 23

True

Question 24

What is an atomic mass unit

Answer 24

1/12 the mass of a carbon atom with six neutrons and six protons

Question 25

How is the periodic table organized?

Answer 25

Period (row) and group (column)

Question 26

Define isotope

Answer 26

Atoms with same # of protons but differing neutrons

Question 27

What is when there are a certain percentage of each isotope naturally found on earth

Answer 27

Natural abundance

Question 28

What is the sum of the number of protons and neutrons in an atom

Answer 28

Mass number

Question 29

What does Avogadro’s constant show?

Answer 29

The number of atoms in one mole of a substance

Question 30

What is mass number on periodic table?

Answer 30

Mass in grams of one mole of x element

Question 31

Define literally mole

Answer 31

The number of atoms in C-12 (Avogadro number)

Question 32

Length between two crests

Answer 32

Wavelength

Question 33

Different amplitude =

Answer 33

Different brightness

Question 34

Different wavelength =

Answer 34

different colors

Question 35

What is the photoelectric effect?`

Answer 35

Observation that metals emit electrons when light shines upon them

Question 36

Why does photoelectric effect happen?

Answer 36

Metal absorbs electron from light and electron from the metal is lost

Question 37

What type of energy does the electron from the light have to exceed to break away one from the metal?

Answer 37

Binding energy

Question 38

Define proton

Answer 38

Quantum of light

Question 39

What is the series of bright lines produced as a result of a prism , and how work

Answer 39

Emission spectrum, sees wavelengths emitted by the substance

Question 40

What is an absorption spectrum and how work?

Answer 40

Dark lines on a bright background, only accepts white light and see which wavelengths are missing

Question 41

ABSORPTION SEES _____ light, EMISSION SEES _____ light

Answer 41

ABSORBTION white, emISSION = specific

Question 42

When emission happens, the electron...

Answer 42

drops an energy level

Question 43

What is emission?

Answer 43

When an atom gives off a photon

Question 44

What is a degenrate?

Answer 44

All orbitals at the same energy level

Question 45

What is a subshell?

Answer 45

Orbitals with the same energy level

Question 46

What is a subshell?

Answer 46

Orbitals with the same energy level

Question 47

How to know if an electron configuration is ground state?

Answer 47

Electrons cannot be transferred to lower energy levels

Question 48

What is excited state?

Answer 48

Electron is temporarily in a energy than ground state

Question 49

Subshell count relates to

Answer 49

Energy level

Question 50

How many orbitals in n=1

Answer 50

One

Question 51

Howmany orbitals in n=2

Answer 51

Four

Question 52

How many orbitals in n=3

Answer 52

Nine

Question 53

How many orbitals in n=4

Answer 53

16

Question 54

Trick to remembering shell count?

Answer 54

1,3,5,7

Question 55

What is SI unit of wavelength

Answer 55

Lambda metres

Question 56

what is the SI unit of energy

Answer 56

Joule

Question 57

SI unit of weight

Answer 57

Kg

Question 58

What is the formula for change in energy?

Answer 58

Ef-Ei

Question 59

Effective nuclear charge formula

Answer 59

of protons vs innermost electons