Scientists use the emission spectra of elements to detect
explosives in luggage.
cracks...
Answers: 2
Chemistry, 22.06.2019 03:30
The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.
Answers: 2
Chemistry, 22.06.2019 14:10
13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.
Answers: 1
Chemistry, 23.06.2019 01:30
What happens to the concentration of hydronium ions as the ph of a solution increases? a. hydronium ion concentration stays the same b. hydronium ion concentration decreases c. hydronium ion concentration increases
Answers: 1
Chemistry, 23.06.2019 06:00
What physical property of gold makes panning a useful way to get gold from streams?
Answers: 2
Mathematics, 28.01.2020 02:31
Mathematics, 28.01.2020 02:31
History, 28.01.2020 02:31
English, 28.01.2020 02:31
Mathematics, 28.01.2020 02:31
Biology, 28.01.2020 02:31
History, 28.01.2020 02:31
Mathematics, 28.01.2020 02:31
Social Studies, 28.01.2020 02:31
History, 28.01.2020 02:31
History, 28.01.2020 02:31