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What is thought to be the physical mechanism that was responsible for the present mix of chemical elements in the universe?
Wiki User
∙ 12y ago
1) Hydrogen and some helium and a fairly small amount of lithium were formed very shortly after the start of the Universe, when matter cooled down enough for quarks to join into nucleons, and for some nucleons to join into heavier elements. There wasn't enough time to form any of the heavier elements.
2) The heavier elements - the so-called metals - were formed inside of stars, by nuclear fusion. In some cases, significant amounts of this matter went back into space, in supernova explosions.
For additional information, I suggest searching Wikipedia or Google for the following topics:
- Nucleosynthesis
- Supernova
- Metallicity
- Nuclear fusion
Wiki User
∙ 12y ago
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What elements have similar chemical and physical properties.?
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The answer to, ' when repeating chemical and physical properties of elements change periodically with the elements' atomic numbers it is called the?'Periodic law, is the answer. PERIODIC LAW !orPeriodicity of the chemical elements properties.
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the chemical and physical behavior of metallic elements
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When the repeating chemical and physical properties of elements change periodically with the elements atomic numbers it is?
The answer to, ' when repeating chemical and physical properties of elements change periodically with the elements' atomic numbers it is called the?'Periodic law, is the answer. PERIODIC LAW !orPeriodicity of the chemical elements properties.
What elements have similar chemical and physical properties.?
elements in the same group
What can be seprated by chemical means but not by physical means?
The elements of a chemical compound can be separated only by chemical means, but not by physical means.
When the repeating chemical and physical properties of elements change periodically with the elements atomic numbers is called?
The answer to, ' when repeating chemical and physical properties of elements change periodically with the elements' atomic numbers it is called the?'Periodic law, is the answer. PERIODIC LAW !orPeriodicity of the chemical elements properties.
When the repeating chemical and physical properties of elements change periodically with the elements' atomic numbers it is called the?
The answer to, ' when repeating chemical and physical properties of elements change periodically with the elements' atomic numbers it is called the?'Periodic law, is the answer. PERIODIC LAW !orPeriodicity of the chemical elements properties.
What sets of elements have similar physical and chemical properties?
Except noble gases the groups of elements in periodic table have the similar chemical properties but not the physical.
Which elements have similar chemical and physical properties?
it is the ~group~ of the periodic table of elements
