igcse question explain why the metal calcium in bulgaria

Is calcium a metal or a mineral? - Quora

Answered 2 years ago. Metal. Calcium is a chemical element with syol Ca and atomic nuer 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to …

Edexcel International GCSE Chemistry - Pearson

20/05/2013· The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question. Advice tt Read each question carefully before you start to answer it. t Keep an eye on the time. t Write your answers neatly and in good English. t Try to answer every question. Check your answers if you have time at the end

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8. Explain why CO 2 is used in (i) fire extinguishers and (ii) fizzy drinks 9. State the name of one green house gas and describe its effect on global temperatures Hydrogen and water 1. Write chemical equations for the following metals with HCl and H 2SO 4 a. magnesium, aluminum, zinc and iron 2. Write an equation for the coustion of hydrogen 3.

a) Extraction and uses of metals – IGCSE Chemistry …

12/03/2017· 5.1 explain how the methods of extraction of the metals in this section are related to their positions in the reactivity series Metal Way of extraction potassium sodium calcium magnesium aluminium extract by electrolysis carbon zinc iron tin lead extract by reaction with carbon or carbon monoxide hydrogen copper silver gold platinum extracted by various…

15.3_metals_qp_-_igcse_cie_chemistry_ …

View Essay - 15.3_metals_qp_-_igcse_cie_chemistry_-_extended_theory_paper.pdf from ENGLISH 30 at James Fowler High School. Properties of Metals Question Paper 3 Level

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Build your study plan. Find exam past papers. Study advice and tips. Need a hand with your GCSEs? You''ll find a huge range of help and support on The Student Room. We''ve got discussion forums, interactive learning resources and expert articles to help you through years 10 and 11.

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4 Calcium carbonate, calcium hydroxide and calcium oxide can be used to neutralise the acid in soil. Plan an investigation to ind out which of these calcium compounds neutralises acid most effectively. Y ou are provided with the three calcium compounds, dilute hydrochloric acid and common laboratory apparatus and chemicals.

Chem marks schemes Flashcards | Quizlet

Explain why electrolysis would not take place in the apparatus with a solid electrolyte (2) solid cant conduct electricity or needs to be in a solution because ions cannot move in …

Question paper 1 - Save My Exams

(b) Steel is an alloy containing iron. These are three differences between steel and aluminium. x steel can rust but aluminium resists corrosion x steel has a higher density than aluminium x steel is much stronger than aluminium (i) Use information from the list to suggest why steel is the better metal for making bridges. (1)

Carbonates - IG Exams

(a) Explain how the addition of oxygen and calcium oxide removes these impurities. Include an equation for a reaction of oxygen and a word equation for a reaction of calcium oxide in this process.. [5] (b) Mild steel is the most common form of steel. Mild steel contains a maximum of 0.3% of carbon. High carbon steel contains 2% of carbon.

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4 Calcium carbonate, calcium hydroxide and calcium oxide can be used to neutralise the acid in soil. Plan an investigation to ind out which of these calcium compounds neutralises acid most effectively. Y ou are provided with the three calcium compounds, dilute hydrochloric acid and common laboratory apparatus and chemicals.

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Select region | Siyavula. Yes, I reside in United States. Change country/curriculum. We use this information to present the correct curriculum and to personalise content to better meet the needs of our users. Practice. back. Mathematics. Physics. Chemistry.

Caridge IGCSE Chemistry (0620)

Caridge IGCSE Chemistry (0620) From 2020, we have made some changes to the wording and layout of the front covers of our question papers to reflect the new Caridge International branding and to make instructions clearer for candidates - learn more. Past papers. June 2019 Question Paper 11 …

June 2015 Question Paper 31 - Revision Science

silicon and phosphorus, which have to be removed when this iron is converted into steel. (a) Explain how the addition of oxygen and calcium oxide removes these impurities. Include an equation for a reaction of oxygen and a word equation for a reaction of calcium oxide in this process.. [5] (b) Mild steel is the most common form of steel

IGCSE Chemistry Revision Flashcards | Quizlet

Start studying IGCSE Chemistry Revision. Learn vocabulary, terms, and more with flashcards, games, and other study tools. add magnesium or any named metal above Hydrogen in reactivity series but not above can neutralise this acid and increase the pH. Explain why calcium carbonate is a better choice.

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The nuer of marks is given in brackets [ ] at the end of each question or part question. CHEMISTRY 0620/41 Paper 4 Theory (Extended) May/June 2017 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. Caridge International Examinations Caridge International General Certiie of Secondary Eduion

GCSE CHEMISTRY - The Structure of Metals …

a metal are sometimes called a "sea of electrons". The structure of a metal can also be shown as In the above picture the dotted lines represent the delocalised electrons. Delocalised electrons are also called free electrons because they can move very easily through the metal structure. It is these free electrons which give metals their properties.

IGCSE Study Guides, Revision & Notes: Metals

The most reactive metals like potassium, sodium and magnesium will burn with a very bright flame and will tarnish quickly in open air. Moderately reactive metals such as magnesium, aluminium, zinc and iron burn in strong flame but don''t tarnish rapidly in open air. Iron as we know rusts to give a red-brownish compound (Fe 2 O 3). The least reactive metals such as lead and copper show oxidisation in strong …

Question paper 1 - Save My Exams

(b) Steel is an alloy containing iron. These are three differences between steel and aluminium. x steel can rust but aluminium resists corrosion x steel has a higher density than aluminium x steel is much stronger than aluminium (i) Use information from the list to suggest why steel is the better metal for making bridges. (1)

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3 Calcium reacts with nitrogen to form the ionic compound calcium nitride, Ca 3 N 2. (a) Draw a diagram, based on the correct formula, which shows the charges on the ions and the arrangement of the electrons around the negative ion. Use o to represent an electron from a calcium atom. Use x to represent an electron from a nitrogen atom. [3]

VMOU Question Papers - Dec 2010 Set 1 | Sales | …

VMOU Question Papers - Dec 2010 Set 1 - Free ebook download as PDF File (.pdf), Text File (.txt) or view presentation slides online. Each question carries equal marks. 1. Explain the functions of sales manager in controlling of salesman. 2. Write an essay on Iron Steel Industry of India. 15 iin ir ;-in ni n i lli | 15 7. Divide India

International GCSE Chemistry - Pearson

21/05/2012· 4 *P40134A0428* Answer ALL questions. 1 A student was asked to find the mass of salt dissolved in 100 cm3 of sea water. She was given the following instructions. Step A Weigh an empty evaporating basin Step B Transfer 50 cm3 of sea water into the basin Step C Heat the sea water in the basin until all the water has evaporated Step D Allow the basin and residue to cool

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6 UCLES 2018 0653/31/M/J/18 3 Fig. 3.1 shows an airship carrying a heavy load. load airship Fig. 3.1 (a) The airship and load are floating above the ground. (i) On Fig. 3.1 draw two force arrows to show the vertical forces acting on the load. [2] (ii) At one point in its journey, the airship is moving and all the forces acting on the airship are balanced.

IGCSE CHEMISTRY Test on Metals

04/03/2020· IGCSE CHEMISTRY Test on Metals. Q.1 Zinc and copper are elements next to each other in the Periodic Table. (a) Zinc is obtained from zinc blende in a two-step process. Outline how each of these steps are done. step 1. Roasting of zinc blende (in oxygen) 2ZnS + 3O2 → 2ZnO + 2SO2. step 2. Reaction with coke.

IGCSE Chemistry: 2.29 Understand that metals can be

2.29 Understand that metals can be arranged in a reactivity series based on the reactions of the metals and their compounds: potassium, sodium, lithium, calcium, magnesium, aluminium, zinc, iron, copper, silver and gold These metals, in order of reactivity are: Potassium; 2.12 Explain, in terms of dissociation, why hydrog

IGCSE CHEMISTRY

IGCSE CHEMISTRY Test on Metals Q.1 Zinc and copper are elements next to each other in the Periodic Table. (a) Zinc is obtained from zinc blende in a two-step process. Outline how each of …

IGCSE Chemistry - Blogger

11/05/2014· The centre of an atom is the nucleus, which is composed of protons and neutrons. Their masses are roughly equal and since the mass of the electron is pretty much negligible, most of the mass of an atom is in the nucleus. The electrons are found in a series of energy levels which you call shells at IGCSE.

Stoichiometry - IG Exams

(c) Explain in terms of collisions between reacting particles each of the following. (i) The reaction rate would be slower if 20.0 g of larger lumps of calcium carbonate and 40 cm3 of hydrochloric acid, concentration 2.0 mol / dm3, were used. [2] (ii) The reaction rate would be faster if the experiment was carried out at a higher temperature.