GCSE Biology key terms
Cells, transport, the nervous system, infection, genetics and ecology: the words the exam expects, with what…
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GCSE Chemistry Flashcards: 45 key terms, for Brainlag Flashcards and Anki
Atoms, separating mixtures, bonding, reactivity, energy changes, crude oil and practical skills: the words and what they mean.
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मेरे Brainlag Flashcards में जोड़ें Anki के लिए डाउनलोड करें CSV डाउनलोड करेंअकाउंट की ज़रूरत नहीं।
विवरण
- कार्ड
- 45
- यह किसके लिए है
- GCSE students (Years 10 and 11)
- इनके साथ चलता है
- Brainlag Flashcards, Anki, कोई भी स्प्रेडशीट
- भाषा
- English
- फ़ाइल साइज़
- 3 KB (Anki)
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कार्ड देखें (45)
- Element
- Has only one type of atom
- Compound
- Has two or more elements chemically combined in fixed proportions
- Mixture
- Has two or more substances not chemically joined
- Filtration
- An insoluble solid from a liquid (sand from water).
- Crystallisation
- A soluble solid from its solution: heat to evaporate some water, cool, filter off the crystals, dry them.
- Simple distillation
- A liquid from a solution (pure water from sea water).
- Fractional distillation
- Liquids with different boiling points. The one with the lowest boiling point reaches the top of the column first.
- Paper chromatography
- The soluble substances in a mixture, such as the dyes in an ink.
सभी 45 दिखाएँ
- Atomic number
- The number of protons.
- Mass number
- Protons + neutrons.
- Isotopes
- Are atoms of the same element with different numbers of neutrons
- Ions
- Have gained or lost electrons
- Period
- The number of occupied electron shells.
- Group
- The number of electrons in the outer shell.
- Group 0
- (noble gases) have full outer shells, so they are unreactive.
- Group 1
- (alkali metals) have one outer electron, which they lose to form 1+ ions.
- Giant ionic lattice
- Huge numbers of positive and negative ions sit in a regular three-dimensional pattern
- Covalent bond
- They share a pair of electrons: one from each atom.
- Pure substance
- A single element or a single compound with nothing else mixed in.
- Formulation
- A mixture designed as a useful product.
- Reactivity series
- Listing metals from most to least reactive
- Oxidation
- Gain of oxygen.
- Reduction
- Loss of oxygen.
- Redox
- A reaction in which one substance is oxidised and another is reduced
- Spectator ions
- An ionic equation leaves them out and shows only the particles that change.
- Test for hydrogen
- Hold a lit splint at the mouth of the tube: a squeaky pop.
- Resolution
- The smallest change an instrument shows.
- Random errors
- Scatter readings; repeats and means reduce them.
- Systematic errors
- Shift every reading the same way, such as a balance that is not zeroed (a zero error).
- Precise
- Repeats close together.
- Accurate
- Close to the true value.
- Repeatable
- Same person, same method agrees.
- Reproducible
- Others get the same.
- Exothermic
- Energy is transferred to the surroundings, so the temperature of the surroundings rises.
- Endothermic
- Energy is taken in from the surroundings, so the temperature falls.
- Hydrocarbons
- Compounds made of hydrogen and carbon atoms only.
- Homologous series
- A family with the same general formula, where each member has one more CH2 than the last, and all react in similar ways.
- Saturated
- Every carbon to carbon bond is a single bond.
- Complete combustion
- Oxidises the carbon to carbon dioxide and the hydrogen to water
- Incomplete combustion
- Also makes carbon monoxide (a toxic gas you cannot see or smell) and carbon (soot).
- Cracking
- Breaks long alkanes into shorter, more useful alkanes and alkenes.
- Law of conservation of mass
- The total mass of the products equals the total mass of the reactants.
- Carbon footprint
- The total greenhouse gas emitted over the life cycle of a product, service or event.
- Greenhouse gases
- (carbon dioxide, methane, water vapour) absorb infrared and re-emit it in all directions
- Tangent
- A straight line that touches the curve at that point without cutting it.