Question and answer
Question not found
Ask a question
Not a good answer? Get an answer now. (Free)
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
what was Henry Moseley's contribution to the periodic table?
Weegy: Henry Gwyn Jeffreys Moseley (23 November 1887 – 10 August 1915) was an English physicist. [ Moseley's outstanding contribution to the science of physics was the justification from physical laws of the previous empirical and chemical concept of the atomic number. This stemmed from his development of Moseley's law in X-ray spectra. Moseley's Law justified many concepts in chemistry by sorting the chemical elements of the periodic table of the elements in a quite logical order based on their physics. Moseley's law advanced atomic physics by providing the first experimental evidence in favor of Niels Bohr's theory, aside from the hydrogen atom spectrum which the Bohr theory was designed to reproduce. That theory refined Ernest Rutherford's and Antonius Van den Broek's model, which proposed that the atom contains in its nucleus a number of positive nuclear charges that is equal to its (atomic) number in the periodic table. This remains the accepted model today. Please also refer to Thank you for using Weegy ] (More)
Question
Expert Answered
Asked 11/3/2011 9:33:07 PM
0 Answers/Comments
what was Henry Moseley's contribution to the periodic table?
Weegy: The Researching around I would say discovery of the "atomic number" used for ordering the elements in the periodic table would probably be the answer. This is recorded as being in 1913. (More)
Question
Expert Answered
Asked 11/3/2011 9:40:39 PM
0 Answers/Comments
The _____________ have a single electron in the highest occupied energy level.
Weegy: valence field User: The _____________ have a single electron in the highest occupied energy level. Weegy: semiconductor like silicon and germanium (More)
Question
Expert Answered
Asked 11/4/2011 6:41:57 AM
0 Answers/Comments
what was Henry Moseley's contribution to the periodic table?
Weegy: In 1914 Henry Moseley found a relationship between an element's X-ray wavelength and its atomic number (Z), and therefore resequenced the table by nuclear charge rather than atomic weight. [ Before this discovery, atomic numbers were just sequential numbers based on an element's atomic weight. Moseley's discovery showed that atomic numbers had an experimentally measurable basis. Thus Moseley placed argon (Z=18) before potassium (Z=19) based on their X-ray wavelengths, despite the fact that argon has a greater atomic weight (39.9) than potassium (39.1). The new order agrees with the chemical properties of these elements, since argon is a noble gas and potassium an alkali metal. Similarly, Moseley placed cobalt before nickel, and was able to explain that tellurium occurs before iodine without revising the experimental atomic weight of tellurium (127.6) as proposed by Mendeleev. Moseley's research also showed that there were gaps in his table at atomic numbers 43 and 61 which are now known to be Technetium and Promethium, respectively, both radioactive and not naturally occurring. Following in the footsteps of Dmitri Mendeleev, Henry Moseley also predicted new elements. ] (More)
Question
Expert Answered
Asked 11/4/2011 8:21:26 AM
0 Answers/Comments
In the transition elements, electrons are usually added to the _______ orbital, which is why these elements are also knows as the _________.
Weegy: In the transition elements, electrons are usually added to the outer orbital, which is why these elements are also knows as the transition metals (More)
Question
Expert Answered
Asked 11/4/2011 8:27:18 AM
0 Answers/Comments
20,581,034 questions answered
Popular Conversations
what is 1 - 100
Weegy: 4(3)^2 - 10(2) = 4(9) - 20; = 36 - 20; = 16 User: what is 1 + 1 Weegy: "What" is used with a noun in ...
4/25/2015 11:26:02 AM| 3 Answers
Which of the following best describes ...
Weegy: The ability to be hammered thin best describes malleability. User: Which of the following is always true ...
4/25/2015 5:51:30 AM| 2 Answers
Which word in the sentence functions as an objective complement? The ...
Weegy: An objective complement is a noun, adjective, or pronoun serving as a complement to a verb and qualifying its ...
4/25/2015 3:38:07 PM| 2 Answers
-12 + 7 + (-1) = User: 19 + (-27) =
4/25/2015 5:32:17 PM| 2 Answers
The Indo-European languages are believed to have originated ...
Weegy: Indo-European languages originated 7,800 to 9,800 years ago in Anatolia present day Turkey. [ The Indo-European ...
4/26/2015 10:36:09 AM| 2 Answers
Which of the following is the least important factor of a personal ...
Weegy: The time of day physical activity will be performed is the least important factor of a personal fitness program. ...
4/25/2015 12:05:36 AM| 1 Answers
Nutritional labels list only healthy nutrients.
4/25/2015 12:12:38 AM| 1 Answers
Weegy Stuff
S
L
Points 712 [Total 2289]| Ratings 1| Comments 702| Invitations 0|Offline
S
L
Points 633 [Total 1200]| Ratings 2| Comments 613| Invitations 0|Offline
S
P
C
L
P
L
1
P
P
1
Points 432 [Total 8309]| Ratings 3| Comments 402| Invitations 0|Offline
S
Points 418 [Total 418]| Ratings 0| Comments 418| Invitations 0|Offline
S
Points 210 [Total 210]| Ratings 1| Comments 200| Invitations 0|Offline
S
Points 197 [Total 197]| Ratings 2| Comments 177| Invitations 0|Offline
S
1
L
L
Points 189 [Total 8183]| Ratings 0| Comments 189| Invitations 0|Offline
S
L
1
R
Points 128 [Total 1200]| Ratings 1| Comments 118| Invitations 0|Offline
S
L
Points 124 [Total 3727]| Ratings 0| Comments 124| Invitations 0|Online
S
1
L
1
Points 43 [Total 3484]| Ratings 1| Comments 33| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2015 Purple Inc.