Which atom is the product (parent isotope) of beta decay of xenon-140? 140
Xe = ?+7e
54
A. 140
I
53
OB. 141
Cs
55
O C. 140
Cs
55
OD. 139
Xe
54

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.