What classification of element is radium?

What classification of element is radium?

alkaline-earth metals
radium (Ra), radioactive chemical element, the heaviest of the alkaline-earth metals of Group 2 (IIa) of the periodic table.

What is a metalloid classified as?

A metalloid is an element that has properties that are intermediate between those of metals and nonmetals. Metalloids can also be called semimetals. On the periodic table, the elements colored yellow, which generally border the stair-step line, are considered to be metalloids.

Which element is a radioactive metalloid?

Polonium is a chemical element in the periodic table that has the symbol Po and atomic number 84. A rare and highly radioactive metalloid, polonium is chemically similar to tellurium and bismuth, and it occurs in uranium ores.

Which of the following is an isotope of radium?

Radium (88Ra) has no stable or nearly stable isotopes, and thus a standard atomic weight cannot be given. The longest lived, and most common, isotope of radium is 226Ra with a half-life of 1600 years. Ra occurs in the decay chain of 238U (often referred to as the radium series).

Is radium a radioactive element?

Radium is a radioactive element of the alkaline earth series of metals. It has the atomic symbol Ra and atomic number 88. Radium is the product of the disintegration of URANIUM and is present in pitchblende and all ores containing uranium. It is used clinically as a source of beta and gamma-rays in radiotherapy, particularly BRACHYTHERAPY.

What is the shape of radium in the periodic table?

Radium is the sixth element of the second column in the periodic table. It is the heaviest of the alkaline earth metals. Radium atoms have 88 electrons and 88 protons with 2 valence electrons in the outer shell. Under standard conditions radium is a silvery metal. It is very radioactive emitting light rays that cause it to glow in the dark.

What is the melting and melting point of radium?

Name:Radium Symbol:Ra Atomic Number:88 Atomic Mass:(226.0) amu Melting Point:700.0 °C (973.15 K, 1292.0 °F) Boiling Point:1737.0 °C (2010.15 K, 3158.6 °F) Number of Protons/Electrons:88 Number of Neutrons:138

What is the electron configuration of radium?

Radium is the sixth element of the second column in the periodic table. It is the heaviest of the alkaline earth metals. Radium atoms have 88 electrons and 88 protons with 2 valence electrons in the outer shell. Characteristics and Properties