Product name:Brass decoration (Lantern)
Application: Decoration for Tombstone ,cemetery or others.
Manufacturer: Sumer International (Beijing) Trading Co.,Ltd
Size: 12*12*23cm, glass size:6.5*13cm
Material: Brass (Copper alloy)
Color /finishing: Antique bronze
Professionally engaged in funeral field over 10 years;
Customized products acceptable;
Good quality and competitive price;
|Main isotopes of copper|
|63Cu||69.15%||is stable with 34 neutrons|
|65Cu||30.85%||is stable with 36 neutrons|
Copper does not react with water, but it does slowly react with atmospheric oxygen to form a layer of brown-black copper oxide which, unlike the rust that forms on iron in moist air, protects the underlying metal from further corrosion (passivation). A green layer of verdigris (copper carbonate) can often be seen on old copper structures, such as the roofing of many older buildings.and the Statue of Liberty.Copper tarnishes when exposed to some sulfur compounds, with which it reacts to form various copper sulfides.
Main article: Isotopes of copper
There are 29 isotopes of copper. 63Cu and 65Cu are stable, with 63Cu comprising approximately 69% of naturally occurring copper; both have a spin of 3⁄2.The other isotopes are radioactive, with the most stable being 67Cu with a half-life of 61.83 hours.Seven metastable isotopes have been characterized; 68mCu is the longest-lived with a half-life of 3.8 minutes. Isotopes with a mass number above 64 decay by β−, whereas those with a mass number below 64 decay by β+. 64Cu, which has a half-life of 12.7 hours, decays both ways.
62Cu and 64Cu have significant applications. 62Cu is used in 62Cu-PTSM as a radioactive tracer for positron emission tomography.
Copper is produced in massive stars and is present in the Earth's crust in a proportion of about 50 parts per million (ppm).It occurs as native copper, in the copper sulfides chalcopyrite and chalcocite, in the copper carbonates azurite and malachite, and in the copper(I) oxide mineral cuprite.The largest mass of elemental copper discovered weighed 420 tonnes and was found in 1857 on the Keweenaw Peninsula in Michigan, US.Native copper is a polycrystal, with the largest single crystal ever described measuring 4.4×3.2×3.2 cm.
Brass decoration lantern
|Contact Person :||Ms. Helen Ren|