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Erstellt von Jessie Howes
vor fast 7 Jahre
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Frage | Antworten |
What does an element consist of? | Atoms with the same atomic number |
How can you tell what type of atom one is? | The number of protons |
What is an element? | A substance with only one kind of atom (they all have the same number of protons) |
What element does the symbol: C/O/Mg Represent | C - Carbon O - Oxygen Mg - Magnesium |
What's the symbol for Sodium/ Iron/ Lead | Sodium - Na Iron - Fe Lead - Pb |
What's an isotope? | A form of the same element with the same number of protons but different numbers of neutrons |
What's different with an isotope - atomic or mass number? | Mass number |
What's relative atomic mass? | The average mass of an element, taking abundance and different masses into account |
What's the formula for calculating the relative atomic mass? | Relative atomic mass = sum of (isotope abundance x isotope mass number) -------------------------------------------------------- Sum of abundances of all the isotopes |
What are compounds? | Substances formed from two or more elements that have in fixed proportions through the compound and chemical bonds |
How are compounds formed? | When elements react and atoms combine |
How are bonds formed? | Atoms giving away, taking or sharing electrons |
What does a compound with a metal and non metal consist of? | Ions |
What is ionic bonding? | When a non metal takes an electron from a metal. The metal is now a positive ion and the non metal is a negative ion. Opposite charges attract, so they're strongly attracted to each other |
What is covalent bonding? | When non metals bond, the atoms share electrons |
True or false: The properties of a compound are the same as the properties of the original elements | False - they're often totally different |
How are compounds represented? | Using a formula |
What's the formula for: Ammonia, Calcium Chloride, Sodium Carbonate and Sulfuric Acid | Ammonia - NH₃ Calcium Chloride - CaCl₂ Sodium Carbonate - Na₂CO₃ Sulfuric Acid - H₂SO₄ |
What is CO₂, H₂O, NaCl, CO, HCl | CO₂ - Carbon Dioxide H₂O - Water NaCl - Sodium Chloride CO - Carbon Monoxide HCL - Hydrochloric Acid |
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