Probably not, as only items specified in AR 670-1 are permitted on uniforms (see related link). Some units allow what's known as "local policy", and your chain of command may permit it as they see fit, but again, the likely answer will be no.
no
No, it is awarded only to enlisted personnel. If an officer is wearing one, they may have earned it while enlisted, prior to receiving their commission.
0-1E 2nd LT.
Yes, prior enlisted Soldiers who became officers can be paid more than new officers higher than their rank. For example, in 2012, a new captain in the reserve is paid at 502.84 per drill weekend while a 1LT with 6 years of prior enlisted experiences is paid at 601.28 per drill weekend and a 2LT with 6 years of prior enlisted experience can be paid at 506.68. In the Army, the Chaplain branch has a category called Chaplain Candidate. They are not "official" officers but are on student status because they are still attending seminary. They will have to submit their packages for accession into full chaplaincy after graduation from seminary; but often times, they can be paid much more than newly accessioned chaplains who have no prior enlisted experiences.
prior
Prior to radar, you couldn't hit what you couldn't see.
Prior
ENLISTED BASIC PAY - Effective January 1, 2010Cumulative Years of Service (0-20 years)Pay Grade2 or lessOver 2Over 3Over 4Over 6Over 8Over 10Over 12Over 14Over 16Over 18E-9 4570.804674.304804.804958.405112.90E-8 3741.603907.204009.504132.504265.404505.40E-72601.002838.902947.503091.803204.003396.903505.503699.003859.503969.004085.70E-62249.702475.302584.502690.702801.403051.003148.203336.003393.603435.603484.50E-52061.302199.302305.502414.402583.902761.802906.702924.702924.702924.702924.70E-41889.701986.302094.002199.902293.802293.802293.802293.802293.802293.802293.80E-31705.801813.201923.001923.001923.001923.001923.001923.001923.001923.001923.00E-21622.101622.101622.101622.101622.101622.101622.101622.101622.101622.101622.10E-11447.20
prior
No, for those who are 17 years old you must have a legal guardian give a parental consent or have a legal emancipation prior to you enlistment.
Any medals, ribbons, or badges they were awarded as an enlisted soldier can be worn as an officer, so long as they're in the same branch. Some branches are selective about which awards from other services they'll permit to be worn on their uniforms.
Kellogg-Briand Pact