Flashcards
@ousmag Sarah Saabi 8A 6.2 Quiz
Flashcards do conjunto (20)
- 1define the term: compoundsSubstances that are made up of more than more than one atom.
- 2Give four examples of compounds1. Water - a clear liquid
2. Salt - a white crystalline solid
3. Vegetable oil - a slippery, yellow liquid
4. Candle wax - soft solid that easily melts - 3How many elements is your body made up of?16
- 4Name the 6 elements that make up 98.5% of your bodyOxygen: 65%
Carbon: 18%
Hydrogen: 10%
Nitrogen: 3%
Calcium: 1.5%
Phosphorus: 1% - 5What is a molecular compound?A compound where the atoms share electrons through covalent (chemical) bonds.
- 6Give three examples of molecular compoundsCarbon monoxide (CO), water (H2O) and glucose (C6H12O6).
- 7How long can the molecule deoxyribonucleic acid (DNA) be and where is it found?DNA is found in the nucleus of a cell and its fine threads can be stretched from 2-3 metres - DNA is long (｡ŏ_ŏ)
- 8What are lattice compounds?Compounds that have atoms that are bonded via repetitive, grid-like structure.
- 9Give two examples of lattice compoundsTable salt/sodium chloride (NaCl) and beach sand/silica/silicon dioxide (SiO2)
- 10What is air -a mixture- composed of?Oxygen, Carbon dioxide, Nitrogen, Water Vapour, Carbon Monoxide
- 11What indicates that something is a mixture rather than a molecule or compound?The fact that mixtures have lists of ingredients due to not being bonded while compounds and molecules have chemical formulas.
- 12What is a solution?A mixture with a substance dissolved in another substance.
- 13What is the solute?The dissolved substance
- 14What is a solvent?The substance that something is dissolved in.
- 15What is the term for a solution that has water as its solvent?an aqueous solution
- 16Give two examples of solutionssalt-water (aqueous) and smoke
- 17What type of mixture is shaving foam?a colloid
- 18Is milk a mixture?Yes.
- 19What is an alloy?A mixture with metals, other metals and/or non-metals.
- 20Give four examples of alloys and their usesStainless Steel (iron, carbon, chromium and nickel): tools and cutlery
Brass: doorknobs, tap fittings and coffee pots
Solder: connects components in electrical circuits
Sterling Silver: jewellery