Atoms and elements

Question 1

This model resulted from the gold foil experiment

Answer 1

Rutherford

Question 2

This model was the first to explain why atoms emit light of a particular colour when exposed to an electromagnetic field

Answer 2

Rutherford-Bohr

Question 3

This model could not explain why atoms could gain or lose electrons and become ions

Answer 3

Dalton

Question 4

Dalton though that all atoms of the same element were identical. This model demonstrates that they are not, because their masses can be different

Answer 4

Simplified. Atomic. Model

Question 5

(From gold foil experiment)
When some (very few) alpha particles bounced back, what is the conclusion…

Answer 5

The atoms nucleus is small and dense

Question 6

(From gold foil experiment)
when most of the particles pass through, what is the conclusion..

Answer 6

The atom is mostly empty space

Question 7

(From gold foil experiment)
When the atom has a positively charged nucleus, what is the observation…

Answer 7

some particles were slightly deflected

Question 8

Periodic trend for electronegetivity

Answer 8

…➡
⬆
up then right

Question 9

periodic trend for MP,BP and Density

Answer 9

➡⬅
closest in the middle

Question 10

periodic trend for Atomic Radius

Answer 10

….⬅
⬇
left then down

Question 11

periodic trend for ionization energy

Answer 11

…➡
⬆
up then right

Question 12

periodic trend for reactivity

Answer 12

Metals:.
…⬅
⬇
left then down

Non-metals:
…➡
⬆
up then right

Question 13

Largest element

Answer 13

Fr, Francium

Question 14

Smallest element

Answer 14

He, Helium

Question 15

Which element has three isotopes

Answer 15

H, Hydrogen

Protium, Deuterium and Tritium

Question 16

Name the family that is soft/light and reacts violently with water

Answer 16

Alkaline metals (1 VE)

Question 17

properties of halogens

Answer 17

Multicoloured and multistate, highly reactive, toxic and corrosive (7 VE)

Question 18

name the family that is non-reactive, colourless and oderless

Answer 18

Inert gases (8 VE)

Question 19

properties of alkaline earth metals

Answer 19

hard, burns easily (2 VE)

Question 20

Properties of Metalloids
tip: staircase

Answer 20

Mix of properties from metals and non-metals
EX. Dull but has lustre
acidic but low density

Question 21

which model is made of tiny indivisible particles called atoms

Answer 21

daltons model

Question 22

what model used cathod rays

Answer 22

thomsons model

Question 23

why was Rutherfords model bad

Answer 23

because it didn’t explain how electrons held their position around the nucleus w/o crashing.. since opposite charges attract