Principals/ Laws/theory's

Question 1

Daltons atomic theory

Answer 1

All matter is made up a very small particles called atoms

All atoms are indivisible they cannot be broken down into simple particles

Question 2

Heisenberg’s uncertainty principle

Answer 2

State that it is impossible to measure at the same time both of the velocity and the position of an electron

Question 3

What is Mendeleevs periodic law

Answer 3

When elements are arranged in order of increasing atomic weight the properties of the electron recur periodicly

Question 4

Modern periodic law

Answer 4

When elements are arranged in order of increasing atomic number the properties of the elements recur periodically

Question 5

Principle of mass spectrometry

Answer 5

That charged particles moving in a magnetic field Are deflected to different extents according to their masses and Are thus separated according to these masses

Question 6

Aufbau principal

Answer 6

When building up the electron configuration of an atom in its ground state the elements occupy the lowest available energy level

Question 7

Hunds rule of maximum multiplicity

Answer 7

States that when two or more orbitals of equal energy I available the electrons occupy them Singly before filling them in pairs

Question 8

Pauli exclusion principle

Answer 8

States that no more than two electrons me Occupy an orbital and they must have opposite spin

Question 9

Octet rule

Answer 9

When bonding occurs atoms tend to reach an electron arrangement with eight elections in the outermost energy level

Question 10

Law of conservation of mass

Answer 10

States that the total mass of the product of a chemical reaction is the same as the total mass of the reactants

Question 11

Law of conservation of matter

Answer 11

States that in a chemical reaction matter is neither created nor destroyed but merely change from one form into another

Question 12

Boyles law

Answer 12

States that I need constant temperature , the volume of a fix d mass of gas is inversely proportional to its pressure

Question 13

Charles law

Answer 13

States that at Constant pressure the volume of the fixed mass of gas is directly portional to its temperature measured on the Kelvin scale

Question 14

Gay-lassais law of combining volumes

Answer 14

States that in a chemical reaction between gases the volume of the chemical gas is on the volumes of any gaseous products in the ratio of small hole numbers provided the volumes of measured at the same temperature and pressure

Question 15

Avogadros law

Answer 15

State that equal volumes of gases containing equal numbers on molecules under the same conditions of temperature and pressure

Question 16

Le chateliers principle

Answer 16

states that if this stress is apply to system at equilibrium the system re-adjusts to relieve the stress applied

Question 17

Hess’s law

Answer 17

States that if the chemical reaction takes place in a number of stages the sum of the heat changes in the separate stages is equal to the heats change if they reactions carried out in one stage

Question 18

Law of conservation of energy

Answer 18

States that energy cannot be created or destroyed but can only be converted from one form of energy into another

Question 19

Principle of steam distillation

Answer 19

Is that a mixture of two immiscible liquids boils at a temperature that is below that of the boiling point of each of the individual liquids.the hot mixture of water vapour from the steam and oil (from the plant) is passed through a condenser and the distillate that is collected contains a mixture of water and oil