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http://encarta.msn.com/encyclopedia_761562418/Helium.html
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What can you say on helium?
Helium affects the resonance frequency of your vocal cords, making your voice sound higher in pitch when you inhale it. This is because sound waves travel faster through helium than through air, causing the pitch to change. Other than that, you can speak normally while on helium gas.
Is it correct to say the chemical changes are not reversible but physical changes are?
yes it is correct because chemical energy means you can't change something back like paper if you burned that paper you can't change it back but if you had that paper and you ripped it you can glue it back you can fix it that is physical energy when you can put something back together so yes you can say that.
Why do elements the same group have similar properties?
Elements in the same group have similar properties because they have the same number of electrons in their outermost shell.
Is boron smooth or rough?
Boron does not have a surface, at least not in the sense that you probably would know it. Boron is a chemical element. While chemical elements do have extensive physical properties (e.g. mass, volume), an atom of any chemical element is so small that the rules of physics as we know them do not adequately apply to/describe it. One could make a pun on quantum superposition and say that an atom of boron is both smooth and rough until you observe it, which is to say that, since matter has both wavelike and particle-like properties, until it is observed, it may or may not be 'smooth' or 'rough.'
How can you use chemical bonding and valence electron in a sentence?
Chemical bonding occurs when atoms share, donate, or accept valence electrons to achieve a stable octet configuration. Valence electrons are the outermost electrons of an atom that are involved in bonding with other atoms, determining the atom's chemical properties.
Is it accurate to say thet helium has no properties?
Well it is partly true. Helium has physical properties like density, boiling point, conductivity etc. But it has no chemical property.
Would it be correct to say that helium has no chemical properties?
no
Why it would be coreect to say that helium has chemical properties?
But of course. One of its properties is that it is very unreactive.
Helium does not react with any other substance Is it accurate to say that helium has no chemical properties?
No, helium is a noble gas on the periodic table of elements and is combustible which is a property of a gas.Additional answer to correct the aboveHelium is indeed a noble gas, which means it won't react with anything. Furthermore, it's not correct to say combustibility is a property of a gas, because there are plenty of gases which are not combustible, for example carbon dioxide, argon, neon, etc.
Name one chemical property of helium?
Helium is about as inert as it's possible for a substance to be. It does form associations... it's not really proper to call them 'compounds'... with other atoms under certain very weird conditions, but these are not stable. It's considered at least theoretically possible for true compounds of helium to exist with the formation of helium-oxygen bonds, but as far as I know none have ever been produced experimentally. For the most part, it's not far off the mark to say that helium has no chemical properties, because it's completely unaffected by chemical processes.
How elements react are called their chemical?
I want to say that the answer is that the concept is called chemical reactivity, but that would be referring to their chemical properties as well..
Can compounds be separated into physical or chemical properties?
I would say it depends on what kind of compound it is.
How are chemical properties and physical properties a like?
Chemical properties are properties that describe chemical traits; for example, reactivity, acidity, and toxicity are all chemical traits; you may say they aren't obvious. A physical property describes a physical trait that has to do with state of being, and are for the mostpart obvious: state of matter, color, odor, shape, melting/freezing point, density, etc.
What are chemical and physical properties of gasoline?
Gasoline has various chemical properties (particularly, it burns very well) and its combustion products have other chemical properties (they don't burn as well) but it would not be correct to say that gasoline in any sense BECOMES a chemical property. Chemicals have properties, they don't become properties.
Why do we say that elements within a group act alike?
The chemical elements in a group have similar properties.
How will you identify the physical properties from chemical properties of water?
1 = when we mix the water with the benzene or any other non polar solvents it does"t miscible with that, this is a chemical reaction from this reaction we can say water has polar properties 2 from above we can say water is polar , in polar solvents inter atomic attractions are more due to this it has high MP like these we can explain all properties
Is crystalline silicon a Metal?
This depends on whom you ask. Astrophysicists say yes because it isn't hydrogen or helium. Materials scientists could call it a metalloid, because it has some metallic properties, and some non-metallic properties. Most scientists would say no because they think of it in terms of its non-metal properties. So you can pick your own answer!
