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Question 1
a) | What is the name of the elements in group 0 of the periodic table? A alkali metals B halogens C transition metals D noble gases
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b) | Which statement about the elements in group 0 is correct? A all elements in the group form positive ions B all elements in the group are very reactive C the relative atomic masses (Ar) decrease down the group D the boiling points increase down the group
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c) | Argon is in group 0. What type of particles are in a sample of argon? A atoms B molecules C ions D alloys
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Question 2
Bromine is an element in group 7 of the periodic table. |
a) | What is the name of the elements in group 7 of the periodic table? A alkali metals B halogens C transition metals D noble gases
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b) | Give the number of electrons in the outer shell of a bromine atom.
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c) | The table below shows the melting point and boiling point of bromine. |
What is the state of bromine at room temperature?
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d) | Complete the sentences below. Going down group 7 the melting points . This is because the size of the molecules so the intermolecular forces . increase increases increase
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e) | All the elements in group 7 react with hydrogen.
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e) i) | Hydrogen and chlorine react to produce hydrogen chloride. Write down the balanced symbol equation for the reaction.
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e) ii) | Suggest the conditions needed for hydrogen and iodine to react. Explain the reason for your answer.
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Question 3
Halogens are elements in group 7 of the periodic table. |
The table below shows the melting points and boiling points of some of the elements in group 7 of the periodic table. |
a) | Why does iodine have a higher boiling point than chlorine?
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b) | Predict the melting point of bromine.
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c) | Astatine (At) is below iodine in Group 7. Predict:
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d) | Sodium is a metal in group 1 of the periodic table. Describe what you would see when sodium reacts with chlorine.
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Question 4
Potassium (K) is an element in group 1 of the periodic table. |
a) | Why do group 1 elements have similar chemical properties? A they have the same number of electrons B they have the same number of electrons in their outer shell C they have the same number of electrons in the first shell D they have the same number of electron shells
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b) | The atomic number of potassium is 19. Give the electronic structure of a potassium atom.
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c) | Write down the balanced symbol equation for the reaction of potassium with water.
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d) | State the trend in reactivity of the group 1 elements.
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Question 5
Halogens are elements in group 7 of the periodic table. Chlorine, bromine and iodine are halogens. A student investigated the reactivity of halogens by carrying out displacement reactions. |
a) | Explain how you would carry out displacement reactions to investigate the relative reactivity of chlorine, bromine and iodine.
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b) | The student recorded his results in the table below. |
Balance the symbol equation for the reaction of aqueous chlorine and potassium iodide solution. Cl2(aq) + KI(aq) → I2(aq) + KCl(aq) 2 2
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c) | Explain how the reactivity of halogens changes going down group 7. Use the results in the table above in your answer.
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Question 6
A student investigated the reaction of lithium and water. The student added water and two drops of universal indicator to a beaker, and placed a small piece of lithium in the water. Lithium reacted with water to produce lithium hydroxide and hydrogen. |
a) | Write down the balanced symbol equation for the reaction of lithium and water. Include state symbols.
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b) | Explain why the group 1 metals are called the alkali metals.
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c) | State two observations that the student would make during the reaction.
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d) | Explain why all group 1 metals have similar reactions with water.
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e) | Potassium is more reactive than lithium. Explain why, in terms of electronic structure.
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f) | Explain why group 1 metals are stored under oil.
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Question 7
Transition elements and group 1 elements are both metals. The table below shows the melting points and formulae of oxides of two transition elements and two group 1 elements. |
a) | Use the data in the table and your own knowledge to compare the chemical and physical properties of transition elements and group 1 elements.
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b) | The boiling points and melting points of some of the elements in group 1 are shown in the table below. |
b) i) | An atom of sodium has a mass number of 23. Give the number of protons, neutrons and electrons in this atom of sodium.
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b) ii) | Plot the data from the table on the graph.
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b) iii) | Use the graph to predict the melting point, X, of potassium, atomic number 19.
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Question 8
A scientist recorded the observations she made when she reacted lithium, potassium and rubidium with water. The scientist's observations are shown in the table below. |
a) | Give two observations that can be made when sodium reacts with water.
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b) | The scientist concluded that, for group 1 elements, reactivity increases down the group. Give two ways in which the scientist's observations support her conclusion.
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c) | Write and balance the equation for the reaction of rubidium with water.
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Question 9
The image below shows some of the elements in the periodic table. |
a) | Give the chemical symbol for one of the noble gases.
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b) | Which of these statements about the noble gases is correct? A the noble gases all have atoms with eight electrons in the outer shell B the noble gases have boiling points that increase going down the group C the noble gases are extremely unstable D the noble gases react with metals to form ionic compounds
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c) | Explain why noble gases are monatomic.
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Question 10
Group 1 metals burn vigorously when heated and placed in a gas jar of oxygen. |
a) | Give the word equation for the reaction of sodium with oxygen.
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b) | What is the name of the type of chemical reaction that occurs when group 1 metals react with oxygen? A electrolysis B precipitation C oxidation D decomposition
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c) | A scientist dissolves the product of the reaction above in water. The solution contains a substance with the formula NaOH. |
c) i) | What is the name of the substance with the formula NaOH?
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c) ii) | Predict the pH value of the solution.
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