What are characteristic properties of elements?

Answer 1

Examples: atomic number, number of isotopes, atomic weight, density, position in the Periodic Table, hardness, electrical conductivity, thermal conductivity, color, odor, crystallographic system etc.

Answer 2

Different elements all have very different properties. However, you can define an element as a substance with only one type of atom in (e.g. only sulphur atoms). If a substance has more than one type of atom in, then it is either a compound or a mixture, depending on whether the elements have bonded.

Answer 3

As you know, there are 118 elements on the Periodic Table (so far) so I'll make a list of them if they were at room temperature (24 degrees celcius).

The Alkalis are soft and metallic. Caesium is pale gold, Francium is supposed to be red, and the rest are gray.

The Alkaline Earths are hard and metallic. Radium is supposed to be a luminescent blue, Beryllium is black and the rest are gray.

The Lanthanoids are hard and metallic. Promethium is supposed to be pink and the rest are gray.

The Actinoids are metallic. Actinium is blue, Thorium is black, Protactinium is supposed to be red, Americium is a metallic blue, Berkelium is supposed to be a luminescent yellow, Californium is orange, Mendelevium is supposed to be a translucent blue, Nobelium and Lawrencium are supposed to be multi-colured, and the rest are gray.

The Noble Gases are gases (obviously). Under a UV spectrum, Helium is pink, Neon is orange, Argon is purple, Krypton is grayish-white, Xenon is blue, and Radon is supposed to be dark red.

The Halogens are soft and non-metallic. Fluorine is a green gas, Chlorine is a yellow gas, Bromine is a reddish-orange liquid, Iodine is a soft solid, and Astatine is supposed to be dark blue.

Hydrogen is a purple gas under a UV spectrum, Carbon is a soft and black solid, Nitrogen is colourless whether it is a liquid or a gas (also purple UV), Oxygen is pale blue as liquid and colourless as a gas (also purple UV), Phosphorus is a soft and red material, Sulfur is a yellow but flakey element, and Selenium is a rough and black material.

The Metalloids are semi-metallic solids. Boron is brown. Silicon, Tellurium, and Antimony are black. Germanium and Polonium are yellowish-white and Arsenic is gray.

The Post-Transition Metals are hard and metallic solids. Lead has a dark metallic look, (Bismuth is multicoloured as a crystal, but gray as a metal), and the rest are gray.

The Transition Metals are all metals. Gold is Gold, Copper is Copper, Silver is Silver (FAIL!!!! :<3DDDDDDDD), Mercury is an extremely metallic liquid, Osmium is blue, Iridium and Nickel are yellow under a light, Molybdenum is soft and black, Tantalum is slightly blue, Ruthenium is a fragile gray, Zinc is dull gray, Manganese is a mixture of some worn-out colours (but only as it naturally occurs), and the rest are a shiny gray.

Rutherfordium is supposed to be red, Dubnium is supposed to be a gray and metallic solid, and the rest I'm not so sure of.

Well, there you go. 118... well, 105 elements that we know have physical properties (phew...).

Answer 4

The melting point, color, reacticity with acid, and it's flammability.

Answer 5

Several characteristic properties include melting and boiling points, density, and reactivity.

Answer 6

An element has chemical and physical properties.

Answer 7

pure substance, unable to be broken down

Answer 8

Pure substance, unable to be broken down.

Answer 9

Elements consist of one type of atom.

Answer 10

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