WebbStraight-chain alkanes are able to pack and layer each other better than their branched counterparts. This allows greater intermolecular forces, which raises the melting point since it will take more energy to disperse the molecules into a liquid. WebbParticle arrangement and movement. The particles in the diagrams could be atoms, molecules or ions depending on the type of substance, eg ionic compounds, small …
Proteins and food - Proteins - Higher Chemistry Revision - BBC …
Webb23 apr. 2024 · A small molecule contains only a few atoms, so atoms and small molecules have a similar range of sizes. They are very small, typically around 0.1 nm or 1 × 10 -10 … Webb15 nov. 2024 · Molecules are made when two or more atoms chemically bond together. Atoms from different elements can combine. When the atoms are from different … Atoms are the building blocks of everything.; Atoms can form strong … Latest weather conditions and forecasts for the UK and the world. Includes up to 14 … Learn about gas pressure and how it is used in daily life in this KS3 Chemistry guide … Almost everything is made of particles. Particles can be atoms, molecules or … Discover what the process of diffusion is and how substances move from an area … Watch live BBC TV channels, enjoy TV programmes you missed and view … Find recipes from your favourite BBC programmes and chefs, or browse by … Use BBC Bitesize to help with your homework, revision and learning. Find … green horned tomato worm life cycle
Polar and non-polar molecules - Structure and bonding - BBC …
WebbThese molecules are the major structural material of animal tissue and are found in animal hair, nails and muscle. Fibrous proteins have their long, spiral chains folded to form long, thin... Webb8 Molecules of life Carbohydrates, proteins, lipids (or fats) are major nutrients that we need in large quantities. We get these by eating them. They are broken down first and then reassembled... Webbför 2 dagar sedan · The human genome was found to contain 20,000 protein-coding genes, which accounts for just 2% of our DNA. The rest of was written off as junk – but it plays … green horned frog