Choosing from the elements in the third row of the Periodic Table write out the chemical formula of (i) A basic oxide. (ii) An amphoteric oxide. (iii) An acidic oxide
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Choosing from the elements in the third row of the Periodic Table write out the
chemical formula of
(i) A basic oxide.
(ii) An amphoteric oxide.
(iii) An acidic oxide
Step by step
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- The elements sodium, aluminum, and chlorine are in the same period. (a) Which has the greatest electronegativity? (b) Which of the atoms is smallest? (c) Which is the largest possible oxidation state for each of these elements? (d) Will the oxide of each element in the highest oxidation state (write its formula) be acidic, basic, or amphoteric?Until the early 1960s the group 8A elements were called the inert gases; before that they were called the rare gases. The term rare gases was dropped after it was discovered that argon accounts for roughly 1% of Earth’s atmosphere. (a) Why was the term inert gases dropped? (b) What discovery triggered this change in name? (c)What name is applied to the group now?Write the chemical formulas for the following compounds:(a) Silver cyanide(b) Calcium hypochlorite(c) Potassium chromate(d) Gallium oxide(e) Potassium superoxide(f) Barium hydrogen carbonate
- Iodine monochloride and elemental bromine have nearly the same molar mass and liquid density but very different boiling points.(a) What molecular property is primarily responsible for this difference in boiling point? What atomic property gives rise to it? Explain.(b) Which substance has a higher boiling point? Why?In general terms, how does each of the following atomic properties influence the metallic character of the main-group elements in a period?(a) Ionization energy(b) Atomic radius(c) Number of outer electrons(d) Effective nuclear chargeThe oxygen and nitrogen families have some obvious sim-ilarities and differences.(a) State two general physical similarities between Group5A(15) and 6A(16) elements. (b) State two general chemical similarities between Group5A(15) and 6A(16) elements.(c) State two chemical similarities between P and S.(d) State two physical similarities between N and O.(e) State two chemical differences between N and O.
- (a) The third row element with the largest first ionization energy. (b) The Group 3A element with the largest first ionization energy. (c) The Group 3A element with the largest atomic radius.Element 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.Each 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.
- Discuss each conclusion from a study of redox reactions:(a) The nitride ion functions only as a reducing agent.(b) The nitrate ion functions only as an oxidizing agent.(c) The nitrite ion functions as an oxidizing or a reducing agent(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.(a) What are the common oxidation states of the halogens?(b) Give an explanation based on electron configuration for the range and values of the oxidation states of chlorine.(c) Why is fluorine an exception to the pattern of oxidation states found for the other group members?