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IGCSE CHEMISTRY

CHAPTER 9

QuestionAnswer
Rubidium is a Group I metal. Name the three statements about rubidium? It has one electron in its outer shell. It reacts vigorously with water. It reacts with chlorine to form rubidium chloride, RbCl .
Name one statement about the elements in Group I Hydrogen is evolved when they react with water.
Element X is in Group I of the Periodic Table. Shows the type of oxide and whether element X is metallic or non-metallic? Type of Oxide - Basic and it is metallic
What are the properties of rubidium? Melts below 63 °C, very soft, reacts explosively with water
X is a Group I metal. Y and Z are Group VII elements. When X reacts with Y a salt is formed. A solution of this salt reacts with Z to form a different salt. What are X, Y and Z? X - Na Y - I2 Z - Cl2
Which pair of elements will react together most violently? Chlorine and potassium
Elements in Group I of the Periodic Table react with water. Describes the products made in the reaction and the trend in reactivity of the elements? Products - Metal hydroxide and hydrogen Trend in reactivity - more reactive down the group
Name one statement about the elements of Group I Potassium has a higher density than lithium.
Element X is a non-metal. In which position of the Periodic Table could element X be found? At the top of Group 0
Fluorine is at the top of Group VII in the Periodic Table. Shows the properties of fluorine? Name 3 points. Colour is yellow State of room temperature is gas Reaction with aqueous potasium iodide displaced
Group I metals are also known as the Alkali Metals. Name three statement about the metals in Group I? 1. In their reactions they lose electrons. 2. Their atoms all have one electron in their outer shell. 3. They form +1 ions in their reactions with non-metals.
Which element will be less reactive than the other members of its group in the Periodic Table? Astatine
Bromine is in Group VII on the Periodic Table. Describes the appearance of bromine at room temperature? Red-brown liquid
Element X is in Group VII of the Periodic Table. It reacts with aqueous potassium bromide as shown. X2 + 2KBr → 2KX + Br2 Name two statements about X Relative atomic mass - less than that of bromine Reactivity - more reactive than bromine
Element X is below iodine in the Periodic Table. Shows the physical state of element X at room temperature and its reactivity compared with that of iodine? Physical state of element X at room temperature is solid Reactivity compared with that of iodine is less reactive
X is a monatomic gas. Name the statement about X X is unreactive
Compares the properties of Group I elements with those of transition elements. The property catalytic activity. Group I element is low Transition elements is high
Name three property of Group I metals? 1 They are soft and can be cut with a knife. 2 They corrode rapidly when exposed to oxygen in the air. 3 They react rapidly with water producing hydrogen gas.
Solutions of a halogen and a sodium halide are mixed. Which mixture darkens in colour because a reaction occurs? Chlorine and sodium iodide
Astatine is an element in Group VII of the Periodic Table. It has only ever been produced in very small amounts. What is the best description of its likely properties? Colour is black The state is solid Reaction with aqueous potassium iodide have no reaction
Describes the trends going down group VII of the Periodic Table? The boiling point and melting point both increase
Name one statements about Argon Argon has a full outer shell of electrons.
Name one statements about noble gases Noble gases all have full outer shells of electrons.
Hydrogen and helium have both been used to fill balloons. Which property of helium makes it the preferred choice to hydrogen? Unreactive
Name three statements about elements in the Periodic Table. 1 Their atoms have a full outer shell of electrons. 2 They are found in Group 0. 3 They are present in small quantities in the air.
An inert gas X is used to fill weather balloons. Describe X. Name 2 points. Number of outer electrons in atoms of X are 2 Structure of gas X are single atoms
Why is argon gas used to fill electric lamps? It is not reactive
Why is argon used instead of air in the light bulb? The filament does not react with the argon.
Why are weather balloons filled with helium rather than hydrogen? Helium is unreactive.
True of false: Helium can be used to fill balloons. True
An inert atmosphere is needed in a lamp to lengthen the useful life of the metal filament. Why is argon, rather than helium, used for this purpose? Argon is more abundant in the air
Elements are arranged in order of ....... number. Proton
The melting points of Group I elements ....... down the group. Decrease
The melting points of Group VII elements ....... down the group Increase
Which information about an element can be used to predict its chemical properties? Position in the Periodic Table
Name one statement about the Periodic Table that is correct? The most metallic elements are on the left.
Name one statement for the element of proton number 19 It is a soft metal that is highly reactive with water.
Where in the Periodic Table is the metallic character of the elements greatest? Left and at the bottom
Why is argon listed before potassium in the Periodic Table? Argon has fewer protons than potassium.
Calcium, on the left of Period 4 of the Periodic Table, is more metallic than bromine on the right of this period. Why is this? Calcium has Fewer outer shell electrons
Which two elements form acidic oxides? Carbon and nitrogen
Which property of elements increases across a period of the Periodic Table? Number of outer shell electrons
Osmium is a transition element. Gives the expected properties of osmium? Name 3 points. Melting point is high Density is high Compound formed are coloured
Name the three properties of the element titanium, Ti, can be predicted from its position in the Periodic Table? Can be used as a catalyst Conducts electricity when solid Forms coloured compounds
Name the three characteristic property of transition metals? Act as catalysts Form coloured compounds High melting point
How do you know that an element is a transition metal? Colour of chlorinde are yellow Melting point of elements 1495 degrees Celsius
Platinum is a transition metal. Name one statement about platinum It forms coloured compounds.
An element has the following properties. ● It forms coloured compounds. ● It acts as a catalyst. ● It melts at 1539 °C. In which part of the Periodic Table is the element found? Transition elements
Which compound is likely to be coloured? KMnO4
The sulfate of element F is green. What other properties is element F likely to have? Density and melting point is high
Created by: Haridus Academy
 

 



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