You have new items in your feed. Click to view.
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
The _____________ have a single electron in the highest occupied energy level.
Weegy: valence field (More)
Question
Updated 110 days ago|9/30/2016 3:10:23 PM
1 Answer/Comment
The Alkali metals have a single electron in the highest occupied energy level.
Added 110 days ago|9/30/2016 3:10:20 PM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by jeifunk [9/30/2016 8:13:46 PM]
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
26,784,209 questions answered
Popular Conversations
Simplify -|-5 + 2| User: How many terms are in the expression shown ...
Weegy: -54 + 18 = -36 User: Simplify 3(x - 4) + 8(x + 2) User: What is the equation of the line that passes through ...
1/17/2017 1:07:03 PM| 5 Answers
3r = 10 + 5s, when r = 10?
Weegy: r(r+3) = 1 User: 5x + 2y = 20, when x = 0.3? User: What is the value of a in the equation 3a + b = 54, when b ...
1/17/2017 9:50:12 AM| 3 Answers
aphelion?
Weegy: C. [ July On July 4, 2008, our planet is at the distant end- a point astronomers call "aphelion." This puts ...
1/18/2017 1:59:28 AM| 3 Answers
All men were given the right to vote in the Fifteenth Amendment, ...
Weegy: All men were given the right to vote in the Fifteenth Amendment, and women in the Nineteenth Amendment. ...
1/17/2017 9:22:18 AM| 2 Answers
If you visit the Senate chamber during a session on an average day, ...
Weegy: Teamwork is a joint action by two or more people or a group, [ in which each person contributes with different ...
1/17/2017 11:14:47 AM| 2 Answers
How many seats in the Senate are up for election every two ...
Weegy: There are 2 pints in a quart. User: Articles 1 and 2 of the Constitution provide senators with all of these ...
1/17/2017 2:31:03 PM| 2 Answers
Solve for x. 7(x - 3) + 3(4 - x) = -8
Weegy: 7(x - 3) + 3(4 - x) = -8 4x - 9 = - 8 4x = - 8 + 9 4x = 1 x = 1/4 User: Solve for x. 7(x + 1) = ...
1/17/2017 3:10:12 PM| 2 Answers
Weegy Stuff
S
Points 308 [Total 308] Ratings 0 Comments 308 Invitations 0 Offline
S
Points 187 [Total 199] Ratings 0 Comments 187 Invitations 0 Offline
S
P
Points 176 [Total 607] Ratings 2 Comments 156 Invitations 0 Offline
S
Points 85 [Total 87] Ratings 5 Comments 35 Invitations 0 Offline
S
P
P
Points 62 [Total 957] Ratings 1 Comments 52 Invitations 0 Offline
S
Points 60 [Total 60] Ratings 6 Comments 0 Invitations 0 Offline
S
L
P
P
P
Points 58 [Total 4017] Ratings 0 Comments 58 Invitations 0 Offline
S
Points 24 [Total 96] Ratings 0 Comments 24 Invitations 0 Offline
S
Points 20 [Total 20] Ratings 2 Comments 0 Invitations 0 Offline
S
Points 12 [Total 12] Ratings 0 Comments 12 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.