Question and answer
what was Henry Moseley's contribution to the periodic table?
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 ]
Expert answered|Bernardo Dela Rosa|Points 105|
Question|Rated bad
Asked 11/3/2011 9:33:07 PM
0 Answers/Comments
Get an answer
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: 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
As the nuclear charge increases across a period, the effective nuclear charge _________ pulling the electrons closer to the nucleus and ________ the size of the atom.
Weegy: As the nuclear charge increases across a period, the effective nuclear charge INCREASES (as the shielding of the outer electrons remains almost constant) pulling the electrons closer to the nucleus and DECREASING the size of the atom." (More)
Question
Expert Answered
Asked 11/4/2011 8:36:00 AM
0 Answers/Comments
19,196,761 questions answered
Popular Conversations
What is the difference between variable and fixed costs? User: What ...
Weegy: Productivity in economics refers to metrics and measures of output from production processes, per unit of input. ...
1/27/2015 7:55:37 AM| 3 Answers
What is a credit card balance?
1/27/2015 11:38:59 AM| 3 Answers
Write the quadratic equation in general form. What is the value of b ...
Weegy: Hence the ball would take about 4 seconds to hit the ground, so the answer is A).4 seconds User: Write the ...
1/27/2015 1:57:55 PM| 3 Answers
If the work put into a lever is 930 joules and the work accomplished ...
Weegy: ... moving 1 meter against a force of 1 newton, so yes one newton.meter is one joule. ... in grams? ... of ...
1/27/2015 2:01:47 PM| 3 Answers
What is 3+3×3÷3-3
Weegy: 23 x 3=69 User: What is Ground Zero
1/27/2015 5:03:53 PM| 3 Answers
What is economic utility?
1/27/2015 8:00:41 AM| 2 Answers
The best way to avoid contracting Rocky Mountain spotted fever ...
Weegy: The Andes are the rocky mountains in South America. User: Ringworm is caused by: a ...
1/27/2015 9:22:02 AM| 2 Answers
What is the solution set of (x - 2)(x - 3) = 2? {1, 4} {2, ...
Weegy: the answer is 5 User: What is the radius of the circle whose equation is x^2 + y^2 = 9? 3 9 81 User: ...
1/27/2015 10:37:53 AM| 2 Answers
Weegy Stuff
S
L
Points 1879 [Total 1900]| Ratings 0| Comments 1879| Invitations 0|Offline
S
L
P
L
P
Points 1370 [Total 6647]| Ratings 0| Comments 1370| Invitations 0|Offline
S
1
L
1
L
P
P
L
P
P
Points 625 [Total 15636]| Ratings 0| Comments 625| Invitations 0|Offline
S
L
Points 438 [Total 1119]| Ratings 2| Comments 418| Invitations 0|Offline
S
1
L
L
Points 254 [Total 6954]| Ratings 0| Comments 254| Invitations 0|Offline
S
P
C
L
P
L
1
Points 92 [Total 6680]| Ratings 1| Comments 82| Invitations 0|Offline
S
Points 87 [Total 102]| Ratings 0| Comments 87| Invitations 0|Offline
S
L
Points 83 [Total 1644]| Ratings 0| Comments 83| Invitations 0|Offline
S
Points 63 [Total 445]| Ratings 0| Comments 63| Invitations 0|Offline
S
Points 50 [Total 52]| Ratings 0| Comments 0| Invitations 5|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.