igcse question explain why the metal calcium in korea

International GCSE Chemistry - Edexcel

21.05.2012· (a) Explain why silicon dioxide reacts with calcium oxide. (2).. (b) Part of the structure of silicon dioxide is shown in the diagram. (i) What does particle A represent? Give a reason for your answer. (2).. (ii) Explain, in terms of its bonding and structure, why silicon dioxide has a very high melting point. (4)

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FACTFILE: GCSE CHEMISTRY: UNIT 2

FACTFILE:˜˚˛˝˜˙ˆˇ˘ GCSE fiflfi CHEMISTRY : UNIT 2.1˙ˆˇ˘ fifi fifi˜˚˛˝˙ˆˇ˛ˆ˘˚ˇ 6 By using experimental data it is possible to place metals in a reactivity series. A tick 3 represents a reaction and an 7 represents no reaction. Metal X Metal Y Metal Z X sulfate 7 7 Y sulfate 3 3 Z sulfate 3 7 Metal X displaces both Y and Z – so it must be the most reactive and be at

Ionic Bonding Exam Questions With …

Example GCSE Questions. All the questions on this page have featured in previous GCSE level exams at one point or another and this is a key topic - it will be in the exam. So check your answers against the markschemes and learn them! Remeer foundation tier questions can also appear in the higher tier paper.

GCSE CHEMISTRY - The Structure of Metals …

Atomic Structure. What is Metallic Bonding?. What is the Structure of a Metal?. Metals form a giant structure (like ionic compounds and giant molecules).. In the picture below the red balls represent metal ions. The blue lines represent delocalised electrons in the outer shell of the metal ions.Delocalised means that the electrons are not attached to one particular ion.

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02.05.2019· (b) Explain why metals are good conductors of electricity and suggest why this conductivity increases across the periodic table from sodium to …

Extraction of Metals | CIE IGCSE Chemistry …

Aluminium is a reactive metal which sits above carbon on the reactivity series. It cannot be extracted from its ore (bauxite) by carbon reduction, so electrolysis is used. Diagram showing the extraction of aluminium by electrolysis . Recycling metals: iron, steel and aluminium. Advantages. Raw materials are conserved (bauxite and haematite)

Ionic Bonding Exam Questions With …

Example GCSE Questions. All the questions on this page have featured in previous GCSE level exams at one point or another and this is a key topic - it will be in the exam. So check your answers against the markschemes and learn them! Remeer foundation tier questions can also appear in the higher tier paper.

Question paper (Higher) : Paper 2 - Sample set 1

questions in the spaces provided. • Do all rough work in this book. Cross through any work you do not want to be marked. Information • There are 100 marks available on this paper. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate.

Ionic Bonding Exam Questions With …

Example GCSE Questions. All the questions on this page have featured in previous GCSE level exams at one point or another and this is a key topic - it will be in the exam. So check your answers against the markschemes and learn them! Remeer foundation tier questions can also appear in the higher tier paper.

Six-mark questions - Sample exam questions …

16.05.2021· Sample question 1 - Foundation Question. Metals are extracted by different methods which are linked to their position in the reactivity series of metals:

The chemistry of steelmaking. Blast furnace.

The metal that leaves the Blast Furnace contains between 4% and 5% of carbon. This much carbon makes a very hard but brittle metal which is not much use. The next step in the production of steel is to reduce the levels of carbon and other impurity elements in the hot metal.

FACTFILE: GCSE CHEMISTRY: UNIT 2

FACTFILE:˜˚˛˝˜˙ˆˇ˘ GCSE fiflfi CHEMISTRY : UNIT 2.1˙ˆˇ˘ fifi fifi˜˚˛˝˙ˆˇ˛ˆ˘˚ˇ 6 By using experimental data it is possible to place metals in a reactivity series. A tick 3 represents a reaction and an 7 represents no reaction. Metal X Metal Y Metal Z X sulfate 7 7 Y sulfate 3 3 Z sulfate 3 7 Metal X displaces both Y and Z – so it must be the most reactive and be at

Question paper (Foundation) : Paper 1 - Sample set 1

Suggest one reason why this anomalous result was obtained. [2 marks] Result Reason . 0 4 . 3 Calculate the mean temperature rise for calcium. [1 mark] Mean temperature rise = o C . Question 4 continues on the next page

Group 1 | AQA GCSE Chemistry Revision Notes

The reactivity of the Group I metals increases as you go down the group.; Each outer shell contains only one electron which is lost during the reaction.; The next shell down automatically becomes the outermost shell and since it is already full, the atom obtains noble gas configuration.; As you go down Group I, the nuer of shells of electrons increases by 1 (Period nuer …

Question paper (Foundation) : Paper 1 - Sample set 1

Suggest one reason why this anomalous result was obtained. [2 marks] Result Reason . 0 4 . 3 Calculate the mean temperature rise for calcium. [1 mark] Mean temperature rise = o C . Question 4 continues on the next page

Previous Year Questions - Metals and Non …

Q.8. (a) When calcium metal is added to water, the gas evolved does not ch fire but the same gas evolved on adding potassium metal to water ches fire. Explain why? (b) Name a metal for each case : (i) It displaces hydrogen gas from nitric …

Caridge Assessment International Eduion Caridge

7 (a) Displacement reactions occur between metals and metal ions. Displacement reactions can be used to determine the order of reactivity of metals such as lead (Pb), nickel (Ni), and silver (Ag). The ionic equation for a displacement reaction is shown. Ni(s) + Pb2+(aq) Pb(s) + Ni2+(aq) The ionic half-equations for this reaction are shown.

Group 1 | AQA GCSE Chemistry Revision Notes

The reactivity of the Group I metals increases as you go down the group.; Each outer shell contains only one electron which is lost during the reaction.; The next shell down automatically becomes the outermost shell and since it is already full, the atom obtains noble gas configuration.; As you go down Group I, the nuer of shells of electrons increases by 1 (Period nuer …

Ionic Bonding Exam Questions With …

Example GCSE Questions. All the questions on this page have featured in previous GCSE level exams at one point or another and this is a key topic - it will be in the exam. So check your answers against the markschemes and learn them! Remeer foundation tier questions can also appear in the higher tier paper.

Chemistry Edexcel IGCSE Flashcards makes it easy to get the grade you want!

Previous Year Questions - Metals and Non …

Q.8. (a) When calcium metal is added to water, the gas evolved does not ch fire but the same gas evolved on adding potassium metal to water ches fire. Explain why? (b) Name a metal for each case : (i) It displaces hydrogen gas from nitric …

C hem gu id e – an sw ers METALLIC BONDING

C hem gu id e – an sw ers METALLIC BONDING 1. a) K: 1s2 2s2 2p6 3s2 3p6 4s1 Ca: 1s 2 2s2 2p6 3s 3p6 4s2 Sc: 1s 2 2s 2p6 3s2 3p6 3d1 4s2 b) In solid potassium, the 4s1 electrons from all the potassium atoms overlap to form a huge system of delocalised molecular orbitals which extend over the whole piece of metal.

Edexcel iGCSE History Resources | Lessons …

The aims and objectives of IGCSE are to help students develop their knowledge and understanding of events, periods of history, and key leadership in order to assess its impact on modern society. By studying through this model, students will be able to engage in historical enquiry, exercise critical thinking, and develop the ability to ask pertinent and relevant questions …

Z04 EDIC SB IGCSE 85169 ANS 345-374

b metals: caesium, molybdenum, nickel, strontium, tin non-metals: chlorine, neon, nitrogen 2 Na ab c Si S 3 a 2, 7 b2, 8, 3 c2, 8, 8, 2 4 a 5 b7 c4 d8 5 a A, F bA c C and D because 5 shells are occupied d C because there are 7 electrons in the outer shell (energy level) e B, D f Calcium – it has 20 electrons and therefore must

Question paper (Foundation) : Paper 1 - Sample set 1

Suggest one reason why this anomalous result was obtained. [2 marks] Result Reason . 0 4 . 3 Calculate the mean temperature rise for calcium. [1 mark] Mean temperature rise = o C . Question 4 continues on the next page

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02.05.2019· (b) Explain why metals are good conductors of electricity and suggest why this conductivity increases across the periodic table from sodium to …

Home - GCSE Exams Preparation

02.05.2019· (b) Explain why metals are good conductors of electricity and suggest why this conductivity increases across the periodic table from sodium to …