Chemistry Ist Final

Question 1

Ernest Rutherford

Answer 1

Gold foil- nuclear model of the atom

Question 2

J.J Thomson

Answer 2

Discovered electron using CRT and plum pudding model (plum pudding model was incorrect)

Question 3

Robert Boyle

Answer 3

Defined Element

Question 4

Dimitri Mendeleev

Answer 4

First model pf the modern periodoc table of elements

Question 5

What is the difference between chemical anf physical change

Answer 5

Chemical- new substamce is produced

Physical- identity of substance doesn’t change

Question 6

Chemical or Physical

Table salt dissolves in water

Answer 6

Physical

Question 7

Chemical or Physical

Water boils at 100* c

Answer 7

Physical

Question 8

Chemical or Physical

Baking a cake

Answer 8

Chemical

Question 9

Chemical or Physical

Digestion of food in your stomach

Answer 9

Chemical

Question 10

Pure substance

Answer 10

Constant composition

Question 11

Element

Answer 11

One type of atom found in periodic table

Question 12

Compound

Answer 12

More than one type of atom

Ex: formula

Question 13

Mixture

Answer 13

Combinations of 2 or more types of matter, each maintains its properties
Compositions varies, heterogenous

Question 14

Solution

Answer 14

Mixture that looks uniform throughout

Homogenous

Question 15

Whoch subatomic particle is rsponsible for the chemical behavior of an element

Answer 15

Electron

Question 16

Isotope

Answer 16

Same number of protons different number of neutrons

Question 17

Which come first the anion or cation

Answer 17

Cation

Question 18

What are the six metalloids

Answer 18

B 
Si
Ge
As
Sb
Te

Question 19

Be able to define families or groups on periodoc table 
Alkali metals 
Alkaline earth metals 
Halogens 
Noble gas 
Transitions metals

Answer 19

Alkali metals- column 1
Alkaline earth metals- column 2
Transitions metals- 3-12 
Halogens- column 17
Noble gases- column 18

Question 20

Precipitate

Answer 20

A substance is deposited in solid form from a solution

Question 21

Soluble

Answer 21

Can dissolve in water and is aqueous

Question 22

Insoluble

Answer 22

Cannot be dissolved in water

Question 23

Acid

Answer 23

Subtance that when dissociated produces H+ ions

Question 24

Base

Answer 24

substance that produces OH-

Question 25

Oxidation

Answer 25

Process of losing one or more electrons

Question 26

Reduction

Answer 26

Process of gaining one or more electrons

Question 27

Atom

Answer 27

Smallest unit of an element

Question 28

Ion

Answer 28

Charged particle + or - charge

Question 29

John Dalton

Answer 29

Atomic theory