Radium

Radium was discovered in 1898 by Marie Curie, Pierre Curie and Gustave Bemont.

Radium is a member of the group 2 (alkaline earth metals) of the periodic table of Mendeleev; the other members are beryllium, calcium, magnesium, strontium, barium.

Radium is also a radioactive element.

The name radium comes from a Latin word radius, which means ray. It was named this because the chemists found that photographic effects were similar at light rays.

Yes.

The thermal conductivity of radium is 18,6 W/m.K at 27 0C.

The electrical resistivity of radium is 1 μΩ.m at 20 0C.

No. X-rays can be generated by radium, but they are not used for any major purpose, and especially not for radiography. The X-rays used are produced by interactions of high-energy electrons; radium is not used because it generates other, non-useful types of radiation, some of which are dangerous to health - making strong enough X-rays would result in toxic amounts of radiation being absorbed by the patient.

Radium is not more powerful than uranium. Both radium and uranium are radioactive elements with different properties and uses. Radium is a decay product of uranium and is less commonly found in nature.

Radium is nearly pure white. When it is exposed to air, though, it immediately oxidizes, turning black. The heaviest of the alkaline earth metals, radium is a chemical element whose atoms - like those of the other alkaline earth metals - have two electrons in their outermost shell; this causes them to react readily and form numerous compounds. The luminescent quality in radium made it ideal for use in self-luminous paints for watches, instrument dials, clocks and the like. Unaware of the danger of the extreme radioactivity of the element, many watch-dial painters who shaped their paintbrushes by putting them between their lips, died from the extended exposure to the radium in the paint. With its hazards come benefits. Today, radium is used medically to treat some kinds of cancer. On this date in 1898, scientists Pierre and Marie Curie and Gustave Bemont discovered radium in pitchblende that came from the now Czech Republic.
Radium has probably a silvery metallic appearance.

Today radium has only limited applications in research laboratories, for example for the preparation of radon standard solutions, in neutron sources of the type Ra-Be, etc.

Possible use in radiotherapy of some cancers.

Radium was used in the past for luminescent painting of watches and other instruments, was used rarely in toothpaste, cosmetics, etc. These applications are not permitted now because radium is strongly radioactive and dangerous.

Now radium hasn't any use at home and in the industry.

radium was not invented, it was discovered.

Two electrons in the outer shell of radium.

Polonium was discovered by Marie Curie and Pierre Curie in 1898.
Radium was discovered by Marie Curie, Pierre Curie and G. Bemont also in 1898.
Studying residues of uranium ores Marie Curie and Pierre Curie found that these residues are more radioactive than uranium; they attributed this radioactivity to unknown elements. They isolated these elements and named these elements polonium and radium.

I don't know about radon, but xenon gas, also a noble gas, is an anion when it makes compounds, as rarely as it does.

Rubidium has one stable isotope,85Rb. The isotope 87Rb which composes almost 28% of naturally occurring rubidium is slightly radioactive, with a half-life of 49 billion years-more than three times longer than the estimated age of the universe.

There are 26 isotopes of rubidium known with naturally occurring rubidium being composed of just two isotopes; Rb-85 (72.2%) and the radioactive Rb-87 (27.8%). Natural rubidium is radioactive with specific activity of about 670 Bq/g, enough to fog photographic film in approximately 30 to 60 days.

Rb-87 has a half-life of 4.88 × 1010 years.

Based on Wikipedia article on Rubidium.

Do not know

In July of 1898, Marie and Pierre Curie discovered polonium. Just five months later, in December of 1898, they went on to discover radium as well.

the answer is A)reimbursement and research

Reimbursement and Research

Simmons solid radium silver is a type of flatware or silverware that was manufactured by the Simmons Company in the early 20th century. It is known for its durability and distinctive design featuring radium detailing, which was a popular decorative element at the time. However, due to the radioactive properties of radium, it is important to handle and use Simmons solid radium silver with caution.

In mathematics, the term "radium" is not commonly used. Radium is a chemical element with the symbol Ra on the periodic table. It is a radioactive element with atomic number 88.

Today radium has only limited applications in research laboratories, for example for the preparation of radon standard solutions, in neutron sources of the type Ra-Be, etc.

Possible use in radiotherapy of some cancers.

Radium was used in the past for luminescent painting of watches and other instruments, was used in toothpaste, cosmetics, etc. These applications are not permitted now because radium is strongly radioactive and dangerous.

skin turned grayish, hurt, and he thought radium could be used in treating cancer. that was later proved after his death.

It isn't used for anything anymore--they have better, safer isotopes to do the things radium was once used for.

The mass number 228 isotope of radium has 88 protons and 140 neutrons. It is a radioactive element with a half-life of about 5.75 years, decaying into radon-220 through alpha decay. Radium-228 is used in medical treatments and research.