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
18,408,181 questions answered
Popular Conversations
3x + 1 User: Factor 25x 2 + 10x + 1.
Weegy: the answer is (1+5 x)^2 User: The length of a rectangle is 3 more than twice the width. The area of the ...
11/21/2014 9:59:24 AM| 4 Answers
Multiply 3X 1 1/4 User: subtract the fractions and simplify the ...
Weegy: 13/15 - 1/5 = 13/15 - 3/15 = 10/15 = 2/3 User: Divide the fractions and simplify the answer 60 divide by 2 2/3 ...
11/21/2014 8:14:33 PM| 3 Answers
Class C helmets are made of aluminum and do not provide protection ...
Weegy: Class C helmets are made of aluminum and do not provide protection from: Electrical hazards. (Class C ...
11/21/2014 1:44:29 AM| 2 Answers
Which pronoun agrees with the antecedent? Both carrots and sweet ...
Weegy: Both carrots and sweet potatoes get ITS color from beta-carotene.
11/21/2014 6:49:00 AM| 2 Answers
One weakness of the British army was fighting on foreign soil.
Weegy: One weakness of the British army was fighting on foreign soil. TRUE.
11/21/2014 7:22:57 AM| 2 Answers
What is translation?
11/21/2014 7:50:29 AM| 2 Answers
Which base is in RNA, but not in ...
11/21/2014 7:46:32 AM| 2 Answers
Identify the solution(s) of the system of equations, if any. -4x - 2y ...
Weegy: -4X-2y=12 -12X-6Y=36 X=(12+2Y)/-4 substitute x to second equation -12[(12+2Y)/-4]-6Y=36 36+6Y-6Y=36 0=0 ...
11/21/2014 9:54:31 AM| 2 Answers
What is the equation of the line that passes through (0, -2) and ...
Weegy: The equation of the line that passes through (0, -2) and has a slope of 0 is y = -2. User: Find two ...
11/21/2014 10:04:27 AM| 2 Answers
The principle of dominance states that a. all alleles are ...
Weegy: Every allele is a _ d. dominant or recessive _ allele. User: In pea plants, yellow peas are dominant over ...
11/21/2014 10:23:12 AM| 2 Answers
Weegy Stuff
S
L
1
L
P
C
1
P
C
1
L
P
C
1
Points 2298 [Total 14009]| Ratings 10| Comments 2198| Invitations 0|Offline
S
L
Points 1255 [Total 3541]| Ratings 0| Comments 1255| Invitations 0|Offline
S
L
Points 686 [Total 1207]| Ratings 6| Comments 626| Invitations 0|Offline
S
1
L
1
L
P
P
L
P
Points 681 [Total 14055]| Ratings 0| Comments 681| Invitations 0|Online
S
Points 421 [Total 453]| Ratings 1| Comments 411| Invitations 0|Offline
S
1
L
L
Points 211 [Total 6605]| Ratings 0| Comments 211| Invitations 0|Offline
S
L
Points 149 [Total 1445]| Ratings 3| Comments 119| Invitations 0|Offline
S
Points 50 [Total 50]| Ratings 0| Comments 0| Invitations 5|Offline
S
Points 46 [Total 46]| Ratings 3| Comments 6| Invitations 1|Offline
S
Points 40 [Total 40]| Ratings 4| Comments 0| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.