Concept explainers
(a)
Interpretation:
State the similarities and dissimilarities in the electronic configuration of following pair of electrons.
Na and Cs.
Concept Introduction:
The current form of periodic table (also known as modern periodic table) contains horizontal rows known as periods and vertical column known as groups.
In each group the elements of similar properties or trend in properties are arranged based on electronic configuration.
There are total seven periods in periodic table and eighteen groups.
(b)
Interpretation:
State the similarities and dissimilarities in the electronic configuration of following pair of electrons.
O and Te.
Concept Introduction:
The current form of periodic table (also known as modern periodic table) contains horizontal rows known as periods and vertical column known as groups.
In each group the elements of similar properties or trend in properties are arranged based on electronic configuration.
There are total seven periods in periodic table and eighteen groups.
(c)
Interpretation:
State the similarities and dissimilarities in the electronic configuration of following pair of electrons.
C and Ge.
Concept Introduction:
The current form of periodic table (also known as modern periodic table) contains horizontal rows known as periods and vertical column known as groups.
In each group the elements of similar properties or trend in properties are arranged based on electronic configuration.
There are total seven periods in periodic table and eighteen groups.
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Introduction to General, Organic and Biochemistry
- 2-89 Assume that a new element has been discovered with atomic number 117. Its chemical properties should be similar to those of astatine (At). Predict whether the new element’s ionization energy will be greater than, the same as, or smaller than that of: (a)At (b)Raarrow_forward2-102 An element consists of 90.51% of an isotope with a mass of 19.992 amu, 0.27% of an isotope with a mass of 20.994 amu, and 9.22% of an isotope with a mass of 21.990 amu. Calculate the average atomic mass and identify the element.arrow_forward2-99 A 7.12 g sample of magnesium is heated with 1.80 g of bromine. All the bromine is used up, and 2.07 g of magnesium bromide is produced. What mass of magnesium remains unreacted?arrow_forward
- 2-12 The elements game, Part 1. Name and give the symbol of the element that is named for each person. (a) Niels Bohr (1885—1962), Nobel Prize for physics in 1922 (b) Pierre and Marie Curie, Nobel Prize for chemistry in 1903 (c) Albert Einstein (1879—1955), Nobel Prize for physics in 1921 (d) Enrico Fermi (1901—1954), Nobel Prize for physics in 1938 (e) Ernest Lawrence (1901—1958), Nobel Prize for physics in 1939 (f) Lise Meitner (1868—1968, codiscoverer of nuclear fission (g) Dmitri Mendeleyev (1834—1907), first person to formulate a workable Periodic Table h) Alfred Nobel (1833—1896), discoverer of dynamite (i) Ernest Rutherford (1871—1937), Nobel Prize for chemistry in 1908 (j) Glen Seaborg (1912—1999), Nobel Prize for chemistry in 1951arrow_forward2-104 The average atomic weight of lithium is 6.941 amu. The two naturally occurring isotopes of lithium have the following masses: 6Li, 6.01512 amu; 7Li, 7.01600 amu. Calculate the percent abundance of 6Li and 7Li in naturally occurring lithium.arrow_forward2-44 Which period(s) in the Periodic Table contain(s) more nonmetals than metals? Which contain(s) more metals than nonmetals?arrow_forward
- 2-43 Which group(s) of the Periodic Table contain(s): (a) Only metals? (b) Only metalloids? (c) Only nonmetals?arrow_forward2-47 Which element in each pair is more metallic? (a) Silicon or aluminum (b) Arsenic or phosphorus (c) Gallium or germanium (d) Gallium or aluminumarrow_forward2-29 How many protons and how many neutrons does each of these isotopes of radon contain? (a) Rn-210 (b) Rn-218 (c) Rn-222arrow_forward
- 2-103 The element silver has two naturally occurring isotopes: 109Ag and 107Ag with a mass of 106.905 amu. Silver consists of 51.82% 07Ag and has an average atomic mass of 107.868 amu. Calculate the mass of 109Agarrow_forward2-35 The two most abundant naturally occurring isotopes of carbon are carbon-12 (98.90%, 12.000 amu) and carbon-13 (1.10%, 13.003 amu). From these abundances, calculate the atomic weight of carbon and compare your calculated value with that given in the Periodic Table.arrow_forward2-27 If each atom in Problem 2-26 acquired two more neutrons, what element would each then be?arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning