Atomic Structure & periodic Table

Question 1

Around how many elements are listed on the periodic table?

Answer 1

100

Question 2

Elements only contain 1 type of…?

Answer 2

Atom

Question 3

How are compounds formed?

Answer 3

They are formed from elements by chemical reactions

Question 4

Definition of a compound?

Answer 4

Two or more elements chemically bonded in fixed proportions

Question 5

what is the only way compounds can be separated from elements?

Answer 5

Chemical reactions

Question 6

What comes first when naming compounds?

Answer 6

Metal

Question 7

What does the compound contain if it ends in IDE?

Answer 7

Just the 2 elements mentioned

Question 8

What does the compound contain if it ends in ATE?

Answer 8

The 2 elements mentioned and oxygen

Question 9

What is the definition of a mixture?

Answer 9

a mixture consists of 2 or more elements/ compounds that are not chemically bonded

Question 10

How can mixtures be separated?

Answer 10

Through physical processes

Question 11

Name the four physical processes

Answer 11

Filtration, crystallisation, simple distillation, fractional distillation

Question 12

What does filtration separate?

Answer 12

an insoluble solid from a liquid

Question 13

What does crystallisation separate?

Answer 13

a solute from a solution e.g salt from water

Question 14

What does simple distillation separate?

Answer 14

a solvent from a solution e.g water from an ink solution

Question 15

What does fractional distillation seperate?

Answer 15

a mixture of miscible liquids with different boiling points

Question 16

What is a solute?

Answer 16

the substance dissolved in a solution e.g salt in salty water

Question 17

What is a solvent?

Answer 17

the substance that dissolves the solute e.g with salty water, water is the solvent

Question 18

Describe the plum pudding model

Answer 18

the atom is a ball of positive charge with negative electrons embedded in it

Question 19

What conclusion did the alpha particle scattering experiment lead to?

Answer 19

Nucleur model- that the mass of an atom is concentrated in the centre (nucleus) and that the nucleus was charged

Question 20

How did Bohr adapt the nucleur model?

Answer 20

he suggested that electrons orbit the nucleus at specific distances

Question 21

What did later expirements lead to?

Answer 21

the idea that the positive charge of any nucleus could be subdivided into smaller particles, each particle having the same amount of positive charge - protons

Question 22

What did Chadwick’s expiremental works provide evidence for?

Answer 22

showed the existence of neutrons in a nucleus

Question 23

How many years from when the nucleus became an accepted idea, did chadwick show existence of neutrons?

Answer 23

20 years

Question 24

What is the electrical charge of a proton, neutron and electron?

Answer 24

+1, 0, -1

Question 25

What is the atomic number?

Answer 25

number of protons in an atom of an element

Question 26

What is the radius of an atom?

Answer 26

0.1nm (1x10^-10m)