AQA A Level Physics復(fù)習(xí)筆記8.2.1 Radioactive Decay
Radioactive Decay Radioactive decay is defined as: The spontaneous disintegration of a nucleus to form a more stable nucleus, resulting in the emission of an alpha, beta or gamma particle Ra...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.8.1 Metallic Bonding
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.8.1 Metallic Bonding Metallic Bonding Metal atoms are held together strongly by metallic bonding Within the?metal lattice, the atoms lose their valence ele...
AQA A Level Physics復(fù)習(xí)筆記8.1.7 Required Practical: Inverse Square-Law for Gamma Radiation
Required Practical: Inverse Square-Law for Gamma Radiation Aim of the Experiment The aim of this experiment is to verify the inverse square law for gamma radiation of a known gamma-emitting ...
AQA A Level Physics復(fù)習(xí)筆記8.1.6 Radiation Safety
Safe Handling of Radioactive Sources It is very well known that radioactive sources are dangerous if handled improperly When choosing a source to work with, the following characteristics are...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.4 Giant Covalent Structures
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.4 Giant Covalent Structures Giant Covalent Structures Covalent bonding can be responsible for substances that have many different structures and therefor...
AQA A Level Physics復(fù)習(xí)筆記8.1.5 Background Radiation
Background Radiation Background radiation describes the low level of radiation present in the surroundings at all times There are two types of sources of background radiation: Natural source...
AQA A Level Physics復(fù)習(xí)筆記8.1.4 Inverse-Square Law of Gamma Radiation
Inverse-Square Law of Gamma Radiation As an electromagnetic wave, gamma radiation shares many of the same wave properties as light Light sources which are further away appear fainter because...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.3 Simple Molecular Structures
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.3 Simple Molecular Structures Simple Molecular Structures Simple molecular structures have covalent bonds joining the atoms together, but intermolecular ...
IB DP Maths: AA HL復(fù)習(xí)筆記4.6.2 Calculations with Normal Distribution
Calculating Normal Probabilities How do I find probabilities using a normal distribution? How do I calculate P(X?=?x): the probability of a single value for a normal distribution?? The probability ...
AQA A Level Physics復(fù)習(xí)筆記8.1.3 Alpha, Beta & Gamma Radiation
Alpha, Beta & Gamma Radiation Alpha Particles Alpha (α) particles?are high energy particles made up of?2 protons and 2 neutrons?(the same as a helium nucleus) They are usually emitted fr...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.2 Covalent Bonds: Dot & Cross Diagrams
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.2 Covalent Bonds: Dot & Cross Diagrams Covalent Bonds: Dot & Cross Diagrams Covalent substances tend to have small molecular structures, such as ...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.1 Formation of Covalent Bonds
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 1.7.1 Formation of Covalent Bonds Formation of Covalent Bonds Non-metal atoms can share electrons with other non-metal atoms to obtain a?full?outer?shell?of ...
