Flashcards
C1 - Elements and Compounds
Flashcards do conjunto (19)
- 1What does an element consist of?Atoms with the same atomic number
- 2How can you tell what type of atom one is?The number of protons
- 3What is an element?A substance with only one kind of atom (they all have the same number of protons)
- 4What element does the symbol: C/O/Mg RepresentC - Carbon
O - Oxygen
Mg - Magnesium - 5What's the symbol for Sodium/ Iron/ LeadSodium - Na
Iron - Fe
Lead - Pb - 6What's an isotope?A form of the same element with the same number of protons but different numbers of neutrons
- 7What's different with an isotope - atomic or mass number?Mass number
- 8What's relative atomic mass?The average mass of an element, taking abundance and different masses into account
- 9What's the formula for calculating the relative atomic mass?Relative atomic mass =
sum of (isotope abundance x isotope mass number)
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Sum of abundances of all the isotopes - 10What are compounds?Substances formed from two or more elements that have in fixed proportions through the compound and chemical bonds
- 11How are compounds formed?When elements react and atoms combine
- 12How are bonds formed?Atoms giving away, taking or sharing electrons
- 13What does a compound with a metal and non metal consist of?Ions
- 14What 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
- 15What is covalent bonding?When non metals bond, the atoms share electrons
- 16True or false: The properties of a compound are the same as the properties of the original elementsFalse - they're often totally different
- 17How are compounds represented?Using a formula
- 18What's the formula for: Ammonia, Calcium Chloride, Sodium Carbonate and Sulfuric AcidAmmonia - NH₃
Calcium Chloride - CaCl₂
Sodium Carbonate - Na₂CO₃
Sulfuric Acid - H₂SO₄ - 19What is CO₂, H₂O, NaCl, CO, HClCO₂ - Carbon Dioxide
H₂O - Water
NaCl - Sodium Chloride
CO - Carbon Monoxide
HCL - Hydrochloric Acid
Informações
- Descrição
- Element and Compound Basics
- Criado por
- Jessie Howes
- Visualizações
- 78
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