100% tevredenheidsgarantie Direct beschikbaar na je betaling Lees online óf als PDF Geen vaste maandelijkse kosten
logo-home
Eerder door jou gezocht
Eerder door jou gezocht
logo
AQA GCSE Chemistry Paper 1 Already Graded A+ $9.55
In winkelwagen
Snel navigeren naar
Voorbeeld
  2.  
  3. AQA GCSE Chemistry Paper 1 Already Graded A+
  4.  
  5. AQA GCSE Chemistry Paper 1 Already Graded A+
  6.  
  7. AQA GCSE Chemistry Paper 1 Already Graded A+

Tentamen (uitwerkingen)

AQA GCSE Chemistry Paper 1 Already Graded A+
 0 keer verkocht
  • Vak
  • AQA GCSE Chemistry Paper 1 Already Graded A+
  • Instelling
  • AQA GCSE Chemistry Paper 1 Already Graded A+

AQA GCSE Chemistry Paper 1 Already Graded A+ 1. What is the smallest unit of an element? Answer: An atom is the smallest part of an element. 2. What is a substance that consists of only one type of atom? Answer: An element is a substance that contains only one type of atom. 3. What are th...

[Meer zien]

Voorbeeld 4 van de 35  pagina's

Document informatie

  • 11 juli 2024
  • 35
  • 2023/2024
  • Tentamen (uitwerkingen)
  • Vragen en antwoorden

Onderwerpen

  • aqa gcse chemistry paper 1 already graded a

Geschreven voor

  • AQA GCSE Chemistry Paper 1 Already Graded A+
  • AQA GCSE Chemistry Paper 1 Already Graded A+
  • AQA GCSE Chemistry Paper 1 Already Graded A+
Alle documenten voor dit vak (1)

Verkoper

avatar-seller
bestscores1

Voorbeeld van de inhoud

AQA GCSE Chemistry Paper 1 Already Graded A+
1. What is the smallest unit of an element?



Answer: An atom is the smallest part of an element.



2. What is a substance that consists of only one type of atom?



Answer: An element is a substance that contains only one type of atom.



3. What are the symbols that represent elements?



Answer: Chemical symbols are the letters or pairs of letters that represent elements, with the first letter
always capitalized.



4. What are substances made up of atoms from two or more elements?



Answer: Compounds are substances in which atoms of two or more elements are chemically combined.



5. What is a combination of symbols that shows the ratio of elements in a compound?



Answer: A chemical formula is a combination of symbols that shows the ratio of elements in a
compound.



6. Why do chemical formulas matter?



Answer: Chemical formulas help to show the different elements in a compound and how many atoms of
each element one molecule of the compound contains.



7. How can compounds be separated from each other?

,Answer: Compounds can be separated through chemical reactions.



8. What are the starting materials in a chemical reaction?



Answer: Reactants are the starting materials in a chemical reaction, listed on the left side of the
equation.



9. What are the ending materials in a chemical reaction?



Answer: Products are the ending materials in a chemical reaction, listed on the right side of the
equation.



10. What is always equal to each other in a chemical reaction?



Answer: Products and reactants are always equal to each other in a chemical reaction, with no atoms
lost or created.



11. What is a mixture made up of?



Answer: A mixture is made up of two or more elements or compounds that are not chemically
combined.



12. What are the properties of mixtures?



Answer: Mixtures retain their own properties from before, such as color.



13. How can mixtures be separated?



Answer: Mixtures can be separated through physical processes, without creating new substances.

,14. What is filtration used for?



Answer: Filtration is used to separate soluble solids from insoluble solids.



15. What is crystallization used for?



Answer: Crystallization is used to obtain a soluble solid from a solution, by gently warming the mixture
and allowing water to evaporate, leaving crystals of pure salt.



16. What is simple distillation used for?



Answer: Simple distillation is used to obtain a solvent from a solution, by heating a set volume to 100°C
and collecting the condensated liquid.



17. How do you analyze and purify water samples from different sources?



Answer: To analyze and purify water samples, use a pH probe or indicator to check pH, set up
equipment, heat a set volume to 100°C, collect condensed liquid, and measure the mass of solid
remaining to find dissolved solids present in the sample.

What is *fractional distillation*? ✔️- used to separate mixtures in which the components have
different boiling points



What is *chromatography*? ✔️used to separate the different soluble, coloured components of a
mixture



What were *atoms* thought to be in *early models*? ✔️Tiny spheres that could not be divided into
simpler particles



What did *Thomson* discover in 1898? ✔️electrons - causing the representative of atoms to be
changed

, What model did *Thomson* make ? ✔️plum pudding model



What was the *plum pudding* model made up of? ✔️- atom contained tiny, negative electrons

- surrounded by a positive charge



What did *Geiger and Marsden* do? ✔️measured the deflection of alpha particles bombarding gold
foil



What did *Geiger and Marsden* conclude about their experiment? ✔️- some alpha particles deflected

- some went straight through



What did *Rutherford* conclude about the *alpha and gold foil* experiment? ✔️- there must be a
positive charge in the center of each atom (new model now called 'nuclear')



What did *Bohr* do? ✔️said that electrons were arranged in levels or orbits around the nucleus



What did *James Chadwick* discover? ✔️neutrons in the nucleus



How big are *atoms*? ✔️- very small

- 0.1nm or 1 x 10^-10m



What do all *atoms* contain? ✔️protons, neutrons, electrons



What is the *relative charge* and *mass* of a *proton*? ✔️1

+1



What is the *relative charge* and *mass* of a *nucleus*? ✔️1

0

Dit zijn jouw voordelen als je samenvattingen koopt bij Stuvia:

Bewezen kwaliteit door reviews

Bewezen kwaliteit door reviews

Studenten hebben al meer dan 850.000 samenvattingen beoordeeld. Zo weet jij zeker dat je de beste keuze maakt!

In een paar klikken geregeld

In een paar klikken geregeld

Geen gedoe — betaal gewoon eenmalig met iDeal, creditcard of je Stuvia-tegoed en je bent klaar. Geen abonnement nodig.

Direct to-the-point

Direct to-the-point

Studenten maken samenvattingen voor studenten. Dat betekent: actuele inhoud waar jij écht wat aan hebt. Geen overbodige details!

Veelgestelde vragen

Wat krijg ik als ik dit document koop?

Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.

Tevredenheidsgarantie: hoe werkt dat?

Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.

Van wie koop ik deze samenvatting?

Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper bestscores1. Stuvia faciliteert de betaling aan de verkoper.

Zit ik meteen vast aan een abonnement?

Nee, je koopt alleen deze samenvatting voor $9.55. Je zit daarna nergens aan vast.

Is Stuvia te vertrouwen?

4,6 sterren op Google & Trustpilot (+1000 reviews)

Afgelopen 30 dagen zijn er 69252 samenvattingen verkocht

Opgericht in 2010, al 15 jaar dé plek om samenvattingen te kopen

Begin nu gratis

Laatst bekeken door jou

Samenvatting ·

(0)

KTHK behandelstrategieen

$9.55
  • (0)
In winkelwagen
Toegevoegd