(a)
Interpretation: To identify whether the elements are metal, non-metal or metalloid from sodium to argon in the periodic table.
Concept introduction: The third period of periodic table have elements as follows; sodium, magnesium, aluminium, silicon, phosphorous, sulfur, chlorine and argon.
Metals are the elements which can form positive ions by loosing electrons. Non-metals are the elements which can form negative ions by gaining electrons. Metalloids are elements which shows both properties of metals and non-metals.
(b)
Interpretation: To identify the colour and appearance of third period elements through sodium to argon.
Concept introduction: The colour of element is a physical property of elements. Elements shows colour due to excitation of electrons by absorbing energy.
(c)
Interpretation: To identify the states (solid, liquid and gas) of elements through sodium to argon.
Concept introduction: There are three types of
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Chemistry & Chemical Reactivity
- Write a balanced chemical equation for each reaction.(a) the reaction between potassium metal and bromine gas(b) the reaction between rubidium metal and liquid water(c) the reaction between gaseous chlorine and solid iodinearrow_forwardSolid boron can be extracted from solid boron oxide by reac- tion with magnesium metal at a high temperature. A second prod- uct is solid magnesium oxide. (a) Write a balanced equation for the reaction. (b) What mass of boron can be produced when 125 kg of boron oxide is heated with 125 kg of magnesium?arrow_forwardComplete and balance the following acid-base equations:(a) A solution of HClO4 is added to a solution of LiOH.(b) Aqueous H2SO4 reacts with NaOH.(c) Ba(OH)2 reacts with HF gas.arrow_forward
- Predict the product(s) and write a balanced equation for each of the following redox reactions:(a) N2(g) + H2(g) →(b) NaClO3(s) →Δ(c) Ba(s) + H2O(l) →arrow_forwardConsider the series of reactions to synthesize the alum (KAl(SO4 )2 · xH2O(s)). ) Assuming an excess of the other reagents, from one mole of sulfuric acid H2SO4 , how many moles of alum will be produced?arrow_forwardMagnesium reacts with oxygen to form magnesium oxide according to the following reaction: 2 Mg + O2 2M9O (a) What is the oxidation state of magnesium in Mg? (b) What is the oxidation state of magnesium in MgO? (c) Which species is oxidized? (d) Which species is reduced? (e) Name the oxidizing agent.arrow_forward
- write a balanced chemical equation for each (A) Iron (III) chloride reacts with sodium hydroxide to produce iron (III) hydroxide and sodium chloride. (B) Magnesium nitrite reacts with perchloric acid to produce magnesium perchlorate and nitrous acid. (C) Copper(II) hydroxide reacts with hydrosulfuric acid to produce copper (II) sulfide and water.arrow_forwardEach of the chemically active Period 2 elements forms sta-ble compounds that have bonds to fluorine.(a) What are the names and formulas of these compounds?(b) Does ΔEN increase or decrease left to right across the period?(c) Does percent ionic character increase or decrease left to right?(d) Draw Lewis structures for these compounds.arrow_forwardWrite equations for the following reactions:(i) Dilute sulphuric acid reacts with zinc granules(ii) Dilute hydrochloric acid reacts with magnesium ribbon.(iii) Dilute sulphuric acid reacts with aluminum powder.arrow_forward
- (a) Which poisonous gas is evolved when white phosphorus is heated with Cone. NaOH solution? Write the chemical equation. (b) Write the formula of first noble gas compound prepared by N. Bartlett. What inspired N. Bartlett to prepare this compound? (c) Fluorine is a stronger oxidising agent than chlorine. Why? (d)Write one use of chlorine gas.arrow_forwardWrite the net ionic equation for the reaction of lead (2) nitrate with sodium chloride.arrow_forwardElement X is a metal with a valency 2. Element Y is a non-metal with a valency 3 (a) Write equations to show how X and Y form ions. (b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.arrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning