11105306
Description
Flashcards by Jessie Howes, updated more than 1 year ago
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Created by Jessie Howes
over 6 years ago
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| Question | Answer |
| 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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