3-27 Answer true or false.
(a) For Group lA and Group 2A elements, the name of the ion each forms is simply the name of the element followed by the word ion; for example, Mg is named magnesium ion.
(b) W is named hydronium ion, and W is named hydride ion.
(c) The nucleus of H consists of one proton and one neutron.
(d) Many transition and inner
(e) In naming metal cations with two different charges, the suffix-ous refers to the ion with a charge of +1 and _ic refers to the ion with a charge of +2.
(f) Fe32 may be named either iron(III) ion or ferric ion.
(g) The anion derived from a bromine atom is named bromine ion.
(h) The anion derived from an oxygen atom is named oxide ion.
(i) HCO3- is named hydrogen carbonate ion.
(j) The prefix bi- in the name “bicarbonate” ionindicates that this ion has a charge of −2.
(k) The hydrogen phosphate ion has a charge of +1, and the dihydrogen phosphate ion has a charge of +2.
(l) The phosphate ion is PO34-.
(m) The nitrite ion is NO2, and the nitrate ion is NO3.
(n) The carbonate ion is CO, and the hydrogen carbonate ion is HCO3-.
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Introduction to General, Organic and Biochemistry
- 2-98 Explain how the ionization energy of atoms changes when proceeding down a group of the Periodic Table and explain why this change occurs.arrow_forward3-58 In Section 2-3B, we saw that there are seven diatomic elements. (a) Draw Lewis structures for each of these diatomic elements. (b) Which diatomic elements are gases at room temperature? Which are liquids? Which are solids?arrow_forward2-67 Account for the fact that the first ionization energy of oxygen is less than that of nitrogen.arrow_forward
- 2-43 Which group(s) of the Periodic Table contain(s): (a) Only metals? (b) Only metalloids? (c) Only nonmetals?arrow_forward2-69 (Chemical Connections 2A) Why does the body need sulfur, calcium, and iron?arrow_forward2-73 (Chemical Connections 2D) Copper is a soft metal. how can it be made harder?arrow_forward
- Arrange the following in the order of increasing mass. (a) a potassium ion, K+ (b) a phosphorus molecule, P4 (c) a potassium atom (d) a platinum atomarrow_forwardv. Answer true or false. (a) Mendeleev discovered that, when elements are arranged in order of increasing atomic weight, certain sets of properties recur periodically. (b) Main-group elements are those in the columns 3A to 8A of the Periodic Table. (e) Nonmetals are found at the top of the Periodic Table, metalloids in the middle, and metals at the bottom. (d) Among the 116 known elements, there are approximately equal numbers of metals and nonmetals. (e) A horizontal row in the Periodic Table is called a group. () The Group 1A elements are called the "alkali metals." (g) The alkali metals react with water to give hydrogen gas and a metal hydroxide, MOH, where “M" is the metal. (h) The halogens are Group 7A elements. (1) The boiling points of noble gases (Group 8A elements) increase in going from top to bottom of the column.arrow_forwardFig 12.1 represents a neutral lithium atom. All the particles in the atom are shown on the diagram. (a) Use Fig. 12.1 to help you answer the following questions. (1) How many electrons does this atom have? (ii) What is the value of the proton number of this atom? (ii) How many neutrons does the atom have? (iv) What is the value of the nucleon number of this atom? (b) Write the appropriate numbers in the boxes below, to represent this atom of Lithium in nuclide notation. Li orbit nucleus Fig. 12.1 (c) Lithium-6 is another isotope of lithium. It has 6nucleons. (i) What is an isotope? (ii) How many protons does Lithium-6 have? (ii) How many neutrons does Lithium-6 havearrow_forward
- (a) What is the formula of the ionic compound expected to form between the elements aluminum and sulfur? (b) What is the formula of the compound formed between the ions SO32- and K+? (c) What ions make up the ionic compound FePO4 ? Cation formula Anion formulaarrow_forwardMany chemical names are similar at first glance. Give the formulas of the species in each set: (a) Ammonium ion and ammonia (b) Magnesium sulfide, magnesium sulfite, and magnesium sulfate (c) Hydrochloric acid, chloric acid, and chlorous acid (d) Cuprous bromide and cupric bromidearrow_forwardChapter 2 3+ 2- + 2.62 Predict the chemical formulas of the compounds formed by the following pairs of ions: (a) Cr³+and Br, (b) Fe³+ and O², (c) Hg and CO (d) Ca and CIO, (e) NH and PO lon Ca2+ Fe 2+ A1³+ 2.64 Complete the table by filling in the formula for the ionic compound formed by each pair of cations and anions, as shown for the first pair. oz - NO3 SOA 504² 2- 3- Aso ASO4 04 + Na Na 2.66 Which of the following are ionic, and which are molecular? (a) PF (b) Nal, (c) SC, (d) Ca(NO₂) (e) FeCl (f) LaP, (g) COCO (h) ₂0 2.78 The oxides of nitrogen are very important components in urban air pollution. Name each of the following compounds: (a) NO, (b) NO, (c) NO₂ (d) N₂O (e) N04arrow_forward
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