Flashcards
Chemistry
Flashcards do conjunto (21)
- 1What does the nucleus containProtons and nuetrons
- 2What charge does the nucleus have? Why?Positive charge because of the protons
- 3Fill the gaps:1. +1
1. 0
Very small. -1 - 4What is an ion?Where the number of protons doesn’t equal the number of electrons (Charged particle)
- 5What does the atomic number and mass number tell uAtomic= amount of protons there are
Mass=total number of protons and neutrons
Atomic-Mass= neutrons - 6What is an elementAtoms that have the same number of protons in the nucleus
- 7What is an isotope?Different forms of the same element which have the same number of protons but a different number of neutrons
(Same atomic. Different mass) - 8Cu-63 has an abundance of 69.2% and Cu-65 has an abundance of 30.8%. relative atomic mass?(69.2 x 63)+(30.8x65)
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69.2+30.8 - 9What is a compoundSubstances formed from two or more elements
- 10Making bonds involves...Atoms giving away or sharing electrons
- 11The metal atoms 1)____ electrons to form 2)________ ions Non-metal atoms 3)____ electrons to form 4)________ ions1) lose
2) positive
3) gain
4)negative - 12What is ionic bondingThe opposite charges of ions (metal and non-metal)
- 13What is covalent bonding? Give an exampleFormed from non-metals
Eg. Water, carbon monoxide - 14What is metallic bonding?the strong electrostatic force of attraction between the metal ions and the delocalised electrons.
- 15What are the symbols for: Carbon dioxide Ammonia Water Sodium chlorideCO2
NH3
H2O
NaCl - 16What are the symbols for: Carbon monoxide Hydrochloric acid Calcium chloride Sodium carbonate Sulfuric acidCO
HCl
CaCl2
Na2CO3
H2SO4 - 17What is the technique used to separate dyes and inkChromatography
- 18What is the 5) step method for chromotography1) draw line at bottom of sheet (pencil)
2)add spot of ink to line and place in water
3)make sure ink doesnt touch solvent (water)
4)each dye of ink will move up the paper and separate
5) when its near the top, take paper out and let it dry - 19What method separates insoluble solids (dont dissolve)from liquidsFiltration
- 20What method is used to separate soluble solids (dissolve) from solutionEvaporation
- 21Another way to separate soluble solids from solutionCrystalistation
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- FlashCards sobre Chemistry , criado por Jasmine O’Neill em 18-01-2019.
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- Jasmine O’Neill
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