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Why the appearance and mass of sodium changes when it reacts with oxygen?
it will burn up
Is it always possible to distinguish two substances from one another based on their appearance explain your answer using specific examples?
Generally is not possible; a chemical/physical analysis is needed.Examples: the appearance of sodium chloride and potassium chloride is similar, the appearance of ethanol and methanol is similar etc.
What is the characteristic of sodium?
sodium is an alkaline metal and has the following properties 1. it reacts with water violently to form NaOH and H2 (g) 2. it reacts with the halogens forming salt of the element 3. it has a golden yellow appearance 4. it reacts with acids and acid anhydride readily
How many electrons are in valence shell of a sodium atom before and after reaction with chlorine gas to give sodium chloride NaCl?
Before : One electron in the valence shell After reaction w/ Cl gas: none electron in the valence shell
What does a magnesium strip look like before it is burnt?
It has the appearance of a thin silver-coloured ribbon.
What are the physical appearance of NaCl before heating?
Sodium chloride at room temperature is a crystalline transparent substance.
What will chromium be in appearance if added to sodium nitrate?
The appearance of chromium will not change if added to the sodium nitrate since it cannot displace nitrate from the sodium.
What appearance does sodium have?
It is shiny.
How does sodium look in nature?
Sodium is a white alkali metal, almost chalky in appearance
What is sodium chloride apperence?
The physical appearance of Sodium chloride is a white crystalline solid.
What the stubstance look like in sodium?
Sodium is a metal, very reactive, with a silvery-white appearance.
Is cutting a bar of sodium metal with a knife a chemical change?
No it is not.
What will chromium be in appearance if added to soodium nitrate?
Chromium will be reddish brown in appearance if added to sodium nitrate.
Why the appearance and mass of sodium changes when it reacts with oxygen?
it will burn up
Is cutting your hair a physcial change?
Yes it is... The hair will grow back,but you're changing the physical appearance by cutting it. Chemically - it's still hair.
Why contraindications should be considered before cutting?
what are the contraindications when cutting hair
Describe the physical appearance of hydrated sodium carbonate?
i think its like washing soda.
