Cadmium is a chemical element with symbol Cd and atomic number 48. Classified as a transition metal, Cadmium is a solid at room temperature.
- 1 What does Cd mean in the periodic table?
- 2 Is cadmium a alkali metal?
- 3 Is Cd classified as a metal?
- 4 What is the symbol of cesium?
- 5 Why is cadmium bad for the environment?
- 6 Why is cadmium banned?
- 7 What materials are used to make CDs?
- 8 Is silicon a metal?
- 9 What are the four quantum numbers of CD?
- 10 What type of solid is CD?
- 11 What type of solid is co2?
What does Cd mean in the periodic table?
cadmium (Cd), chemical element, a metal of Group 12 (IIb, or zinc group) of the periodic table.
Is cadmium a alkali metal?
Cadmium is a lustrous, silver-white, ductile, very malleable metal. Its surface has a bluish tinge and the metal is soft enough to be cut with a knife, but it tarnishes in air. It is soluble in acids but not in alkalis.
Is Cd classified as a metal?
Cadmium (Cd) is a soft, malleable, bluish white metal found in zinc ores, and to a much lesser extent, in the cadmium mineral greenockite. Most of the cadmium produced today is obtained from zinc byproducts and recovered from spent nickel-cadmium batteries.
What is the symbol of cesium?
It is most often found in small quantities in zinc ores, such as sphalerite (ZnS). Cadmium mineral deposits are found in Colorado, Illinois, Missouri, Washington and Utah, as well as Bolivia, Guatemala, Hungary and Kazakhstan. However, almost all cadmium in use is a by-product of treating zinc, copper and lead ores.
Why is cadmium bad for the environment?
Cadmium can accumulate in liver, kidneys and bones, which may serve as sources of exposure later in life. In the environment, cadmium is toxic to plants, animals and micro-organisms. Being a simple chemical element, cadmium is persistent – it cannot be broken down into less toxic substances in the environment.
Why is cadmium banned?
The ban on cadmium in jewelry is intended to protect consumers, particularly children, from the toxic metal, which has been increasingly showing up in inexpensive costume jewelry imported from China.
What materials are used to make CDs?
CDs consist of three layers of materials:
- A base layer made of a polycarbonate plastic.
- A thin layer of aluminum coating over the polycarbonate plastic.
- A clear protective acrylic coating over the aluminum layer.
Is silicon a metal?
Silicon is neither metal nor non-metal; it’s a metalloid, an element that falls somewhere between the two. Silicon was first isolated in 1824 by Swedish chemist Jöns Jacob Berzelius, who also discovered cerium, selenium and thorium, according to the Chemical Heritage Foundation.
What are the four quantum numbers of CD?
Cadmium atoms have 48 electrons and the electronic shell structure is [2, 8, 18, 18, 2 ] with Atomic Term Symbol (Quantum Numbers) 1S.
What type of solid is CD?
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Cadmium sulfide is the inorganic compound with the formula CdS. Cadmium sulfide is a yellow solid.
What type of solid is co2?
Solid carbon dioxide, known as dry ice, is a type of molecular solid.