Chapter 2 and 3

Question 1

Who created plum pudding model and what is it

Answer 1

JJ Thomson positively charged pudding

Question 2

Who made good foil experiment and why is it significant?

Answer 2

Ernest Rutherford proved his teacher wrong as provided evidence for protons

Question 3

Who created periodic table

Answer 3

Russian chemist Dmitri Mendeleev

Question 4

Alkali metals

Answer 4

Group 1 soft shiny, conduct heat and electricity, react with water

Question 5

Alkaline earth metals

Answer 5

Group 2 not as reactive as group 1, tend to make basic solutions in water

Question 6

Transition metals

Answer 6

Group 3-12 high densities and BP, good conductors, vivid colors when placed in solutions

Question 7

Lanthanides

Answer 7

Elements 57-71 commonly used is lasers deflects UV and infrared

Question 8

Actinides

Answer 8

Elements 89-103

Radioactive

Question 9

Groups 13-16

Answer 9

No common name
Boundary between metals and nonmetals
Abundant in earths crust

Question 10

Halogens

Answer 10

Group 17
Love to form salts with metals
Likes to form diatomic molecules

Question 11

Noble gases

Answer 11

Group 18
Nonreactive
Don’t like to bond with other molecules

Question 12

Diatomic molecules

Answer 12

Made of only two atoms same or different

Question 13

Allotropes

Answer 13

Different forms of same element

Question 14

Isotopes

Answer 14

Element with different number of neutrons

Question 15

S orbital

Answer 15

Sphere

Lowest energy

Question 16

P orbitals

Answer 16

Dumbbell

Comes in 3s

Question 17

D orbitals

Answer 17

Double dumbbell

Comes in 5s

Question 18

F orbitals

Answer 18

Comes in 7s

Question 19

Hunds rule

Answer 19

Electrons only pair when other spaces are already occupied

Question 20

Core vs valence electrons

Answer 20

Valence are the ones in last shell

Question 21

Lewis dot structure

Answer 21

Represent valence electrons

Question 22

Octet rule

Answer 22

Atoms want 8 valence electrons

Question 23

Anion

Answer 23

• charge

Question 24

Cation

Answer 24

+ charge

Question 25

Weight of proton

Answer 25

1 (u)