Unit 1

Question 1

Scientist in order

Answer 1

Democritius, alchemists, dalton, thompson, rutherford, bohr, heisenburg

Question 2

Democritus

Answer 2

First atomic theories, came up with atomis which means indivisible, name atom came from him.

Question 3

Alchemists

Answer 3

Earliests chemists, used experimentation. Tgey distill liquids, mix metals etc. Original goal was go create gold

Question 4

What did aristole propose?

Answer 4

Earth,wind, fire, water and ether

Question 5

What is ether?

Answer 5

A substance thar filled slace between elements. Most heavenly

Question 6

Dalton

Answer 6

Billard ball.atomic theory. All elements composed of atoms, all atoms of same element are identical

Question 7

Thompson

Answer 7

Electrons. Passed electricity over a vaccum tive, removed electrons. Called raisin bun model

Question 8

Rutherford

Answer 8

Nucleus. Shot alpha particles throufh gold foil. 99.9 went through. Coined word proton. Most of an atom is empty space

Question 9

Bohr

Answer 9

Energy levels. Electrons emit light when they go closer to nucleus, absorb light when they move away

Question 10

Heisenburg

Answer 10

Uncertainty principle. Cannog know the position and momentum of electrons. Found in probability clouds

Question 11

Quantum model

Answer 11

Also know as clpud model

Question 12

Octet rule

Answer 12

8 valent electrons in outershell

Question 13

What group/familg have a full octet

Answer 13

Noble gasses, very stable

Question 14

Covalent bonds

Answer 14

Share electrons(molecular)

Question 15

Ionic bonds

Answer 15

Transfer electrons

Question 16

Molecular

Answer 16

2 non metals(use prefixes)

Question 17

Ionic

Answer 17

Metal+non

Question 18

Positive ions are called

Answer 18

Cations

Question 19

Negative ions=

Answer 19

Anion

Question 20

Properties of ionic compounds

Answer 20

Solid at room temp, confuct in aq and livuid state, crytal lattice, hard/brittle, high mp and bp

Question 21

Properties of molecular compounds

Answer 21

S,L,G. Soft/squishy, non conductors, relatively low mp and bp

Question 22

Sea model

Answer 22

Valent electrons in metals are loosely attached to their metal nuclei therefore thry can move from one go another nuclei ghere fore the conduct

Question 23

Different properties of metals that ionic solids

Answer 23

Lustrous, malleable, ductile, confucg in solid state

Question 24

What type of substances conficg electricity

Answer 24

Ionic/metals

Question 25

Network solid

Answer 25

Interlocking network of bonds

Question 26

Valence electrons

Answer 26

Outermost electrons, highest energy level

Question 27

How do atoms gain charges

Answer 27

They gain or lose electrons

Question 28

Metal+non come in contact

Answer 28

Non will steal electeons foroming negative ion and metal will become positive

Question 29

Polyatomic ion

Answer 29

Ions consisting of more than 1 element ex: NH4+

Question 30

Multivalent

Answer 30

More than 1 charge

Question 31

Ionic formula

Answer 31

Switch*

Question 32

Lewis dot diagram

Answer 32

Representation if valence electrons in atoms making up a compound, atoms arraged to share valwnce electrons to obstain the octet or most stsble form

Question 33

Electronegativity

Answer 33

Ability of an atom to attract electrons to itself

Question 34

Polar bond

Answer 34

Unequal sharong lf val e-

Question 35

No polr bond

Answer 35

Equal sharing

Question 36

Dipole

Answer 36

Partial charge caused from unequal sharing

Question 37

Inteamolecular force

Answer 37

Hold tovether atoms making up a molecile or compound- ionic-covalent and metallic

Question 38

Inter vs intra

Answer 38

Bonds not stable, caused by momentarty polarization of particles

Question 39

Intra=

Answer 39

Between atoms/withon molecules

Question 40

Inter=

Answer 40

Between molecules, occur in molecular substances

Question 41

Attraction between intra

Answer 41

Is strong

Question 42

Most electronegative element is

Answer 42

Fluorine

Question 43

Shape

Answer 43

If symmetrical= non-polar

Question 44

If non symmetrical

Answer 44

= polar

Question 45

Ligands the same+no lone pairs

Answer 45

Non polar

Question 46

Atoms are the same

Answer 46

=non polar

Question 47

2 main thpes of intermolecular forces

Answer 47

Van der waals and hydrogen bonds

Question 48

Van der waals

Answer 48

Weakest, between 2 molecules. There are 2 types LD (identical molecules of polar bond symmetry) and DD(polar)

Question 49

Hydrogen bonds

Answer 49

Strongest