@ousmag Sarah Saabi 8A 6.2 Quiz

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Sara. H S.
Flashcards by Sara. H S., updated more than 1 year ago
Sara. H S.
Created by Sara. H S. over 6 years ago
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Question Answer
define the term: compounds Substances that are made up of more than more than one atom.
Give four examples of compounds 1. 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
How many elements is your body made up of? 16
Name the 6 elements that make up 98.5% of your body Oxygen: 65% Carbon: 18% Hydrogen: 10% Nitrogen: 3% Calcium: 1.5% Phosphorus: 1%
What is a molecular compound? A compound where the atoms share electrons through covalent (chemical) bonds.
Give three examples of molecular compounds Carbon monoxide (CO), water (H2O) and glucose (C6H12O6).
How 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)
What are lattice compounds? Compounds that have atoms that are bonded via repetitive, grid-like structure.
Give two examples of lattice compounds Table salt/sodium chloride (NaCl) and beach sand/silica/silicon dioxide (SiO2)
What is air -a mixture- composed of? Oxygen, Carbon dioxide, Nitrogen, Water Vapour, Carbon Monoxide
What 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.
What is a solution? A mixture with a substance dissolved in another substance.
What is the solute? The dissolved substance
What is a solvent? The substance that something is dissolved in.
What is the term for a solution that has water as its solvent? an aqueous solution
Give two examples of solutions salt-water (aqueous) and smoke
What type of mixture is shaving foam? a colloid
Is milk a mixture? Yes.
What is an alloy? A mixture with metals, other metals and/or non-metals.
Give four examples of alloys and their uses Stainless 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
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