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Radioactive elements give off radiation. The emission of radiation occurs when an unstable atomic nucleus tries to become stable. Some examples of radioactive elements are radium, curium, nobelium, rubidium, and polonium.
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Mixtures whose particles are smaller than those in heterogeneous mixtures and larger than those in solutions are called what?
elements
What are forensic scientists called whose opinions are influenced by what side is paying them for their service?
An expert witness
What is an area of land whose boundaries are determined by the direction of water flow called?
The answer is Water Shed
How are liquids and solids the same?
Liquids and solids are same in the way that they are made out of the same atoms, just those atoms are being set in a different environment and temperature.
How is heat energy transferred through radiation?
Body heat is lost by radiation because the heat that is produced from the body, is given-off to the surrounding atmosphere. For example, where the body is heat and when you sit in front of a fan, the cool air from the fan blows the heat away.
What is it called when two elements whose atoms are chemically bonded form?
Compound !!
Substance in which all atoms are alike?
A substance in which all atoms are identical is called an element.
Type of matter whose atoms are all the same?
Elements
Why those elements does not emit radiation whose atomic number is less than 82?
Because such nuclei have stable ratio of protons and neutrons, but some atoms having atomic no less than 82 are also radioactive.
What are three elements whose atoms are likely to form bonds?
Helium, neon and argon are the least likely elements to form compounds.
Why do inert elements exist as mono atoms in molecules?
Inert elements are those elements whose valency is 0 therefore they are very less reactive in nature, they do not tend to form chemical bonds and therefore they exist as mono atoms in molecules.
How does the number of the outer energy level electrons relate to the properties of elements?
Elements whose atoms have the same number of outer electrons have similar properties..
How does the number of outer energy level electrons related to the properties of elements?
Elements whose atoms have the same number of outer electrons have similar properties..
Do atoms have neutrons in them?
Atoms of all elements can have neutrons in them. Only the element hydrogen has an isotope whose atoms do not contain neutrons, but all other isotopes of hydrogen have neutrons in them. In the heavier elements the number of neutrons always exceeds the number of protons in the atom.
How are atoms connected to an element?
Well the connection between atoms and elements is they are a compound... Usually compounds have quite different properties (e.g. colour, texture, taste, smell and density) from the elements whose atoms they contain... For example: the compound of water is a liquid at room temperature. Water contains atoms of the elements hydrogen and oxygen, which exist in air as colourless glass - quite different to water...
Why do atoms of each element have 1 outer-level electron?
They don't. Of the main group, or representative elements, group 1 elements are the only ones whose atoms have only 1 electron in their outermost energy levels.
Elements whose atoms can combine to form compounds?
Reactive elements have atoms that can combine to form compounds. The atoms in a compound are combined through different types of bonds, such as ionic, covalent, hydrogen, and metallic bonding. With ionic bonding, there is an exchange of electrons between atoms. Covalent bonding occurs when electrons are shared by two atoms.
