https://padlet.com/subhoshree15/Observations2021Grade9D Revision Hydrogen en-us 2021-09-08 10:18:35 UTC 2023-05-21 09:43:48 UTC hello@padlet.com subhoshree15 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1724467077 2021-09-08 10:18:35 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1724467077 subhoshree15 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1724467078 2021-09-08 10:18:35 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1724467078 subhoshree15 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1724467079 2021-09-08 10:18:35 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1724467079 subhoshree15 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1724467080 2021-09-08 10:18:35 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1724467080 atharvam39 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756276042 The sodium metal darts about on the surface of the water for ming a silvery grey globule. It floats on the surface of water.
The flame colour is golden yellow.

]]> 2021-09-21 06:41:20 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756276042 pranavnair2710 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756278242 1) Sodium floats on water, because it is lighter than water.
2) Then, Sodium melts. The sodium globule darts around on the surface of water as a silvery grey globule.
4) It burns with a golden yellow flame.

]]> 2021-09-21 06:42:36 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756278242 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756280407 Primary observation: Does not react with air nor water, rather sinks in water at room temperature.

Next, upon heating, the piece comes up and effervescence starts happening. Solution turns purple in colour.]]> 2021-09-21 06:43:52 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756280407 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756284501 When calcium is added in the beaker containing water following are the observations:-
a. The calcium table submerges in the water completely.
b. The calcium tablet vigorously reacts in water forming effervescence.
c. The water changes its color from transparent to whitish-grey color.
d. The temperature of the water also might have increased.

]]> 2021-09-21 06:46:06 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756284501 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756284586 Magnesium reacts with water and as a result, the colour of the solution changes to a brownish colour. It will turn purple after some time as Magnesium hydroxide will be formed.Effervescence also takes place.]]> 2021-09-21 06:46:10 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756284586 sahibawalia21 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756286214 ->silver coloured globule is formed, which darts around on the surface of the water.
->burns with a golden yellow flame
-> its a vigorous  and exothermic reaction
-> gas is released
-> sodium floats on water as it is lighter]]> 2021-09-21 06:47:08 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756286214 rudrakhetani https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756286772 In this experiment the following things were observed -
1. There was creation of effervescence. 
2. It is exothermic since, on touching the test tube you can feel the heat/high temperature.
3. Soapy and milky looking mixture is seen.]]> 2021-09-21 06:47:28 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756286772 agastya1373 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756288629 1. Effervescence
2. Exothermic reaction
3. Milky solution
4. Metal stays at the bottom
5. Hydrogen burns with a pop sound and forms condensation on the walls of the test tube]]> 2021-09-21 06:48:25 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756288629 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756288788 The silver globule darts around the surface of water, and burns with a golden flame. The reaction is highly vigorous. Sodium floats on water as it's density is less than water.]]> 2021-09-21 06:48:32 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756288788 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756289042 JANNAN:
1) The sodium globule is floating on water since its density is less than that of water.
2) The reaction is vigorous
3) The sodium globule darts about on the surface of the water
4) It burns with a characteristic golden yellow colour. 
5) 2Na (s) + 2H20--> 2NaOH + H2 (g) ]]> 2021-09-21 06:48:41 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756289042 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756290037 Magnesium does not react with water as soon as it is put in the test tube. 

The Magnesium reacts slowly as the water starts to bubble and after some time, the solution turns purple as Magnesium Hydroxide is produced.]]> 2021-09-21 06:49:17 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756290037 vrinda_sharma https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756290125 Calcium first sinks in water contained in the beaker 
then it vigorously reacts with water and we see effervescence take place 
then water changes form clear to white-milky colour ]]> 2021-09-21 06:49:20 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756290125 nikleo99911 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756290137 The small piece of magnesium metal sinks in water and slowly starts to react.
The process is slow until the water is heated. Upon heating water the reaction takes place rapidly making the solution purple.
Effervescence also occurs.

]]> 2021-09-21 06:49:21 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756290137 rishikasharmaindia https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756291536 1. The tablet is dense and sinks in water completely.
2.  A vigorous reaction takes place, causing effervescence and a gas is released. Bubbles and small puffs of gas are seen.
3. The water changes into a milky-white colour]]> 2021-09-21 06:50:07 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756291536 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756291554 When calcium is added to water we can see that 
1) The calcium sinks in water
2)calcium reacts vigorously with water
3) We can see the effervescence are formed
4)The colour of water changes From transparent to whitish milky colour. ]]> 2021-09-21 06:50:07 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756291554 srushhkokate https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756291818 When the Calcium Metal is dropped into water after a second the metal begins to bubble vigorously (Effervescence) as it reacts with water producing a gas and a white precipitate.. ]]> 2021-09-21 06:50:17 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756291818 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756292765 I observed that 
1.this reaction produces hydrogen gas.
2.it gives out heat.
3.effervesence
4.it forms a milky solution.
5.hydrogen burns with a pop sound.
6.hydrogen gives out heat



]]> 2021-09-21 06:50:52 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756292765 nikleo99911 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756292775 The small piece of magnesium metal sinks in water and slowly starts to react.
The process is slow until the water is heated. Upon heating water the reaction takes place rapidly making the solution purple.
Effervescence also occurs.

]]> 2021-09-21 06:50:52 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756292775 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756293786 - Globule darts around on the surface of the water.
- The flame is golden orange in colour.
- There is a violent exothermic reaction with heat and explosive flame,

]]> 2021-09-21 06:51:27 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756293786 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756297542 Calcium metal reacts with water as it is put in the beaker.

There is a formation of effervesence.
There is a increase in temprature.
The water turns milky.]]> 2021-09-21 06:53:37 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756297542 ananya1735avalon https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756297603 We can observe that Magnesium is not as reactive as the alkali metals and does not vigorously react with water or air. When the water in which magnesium is  put is heated the reaction takes place. When the water is hot Magnesium hydroxide is formed and hydrogen gas is liberated. The reaction will increase as the solution is heated and Magnesium hydroxide is formed turns purple and the bubbles then seen are not hydrogen but steam.]]> 2021-09-21 06:53:39 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756297603 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756299306 Magnesium also sinks inside the water. 
Magnesium is reacting with water and we can see it changes to purple and also bubbles are formed 


]]> 2021-09-21 06:54:38 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756299306 shouryabhutani6 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756299804 Observations:
1. Hydrogen gas was formed
2. It is exothermic since it gives out heat which can be felt by touching the test tube.
3. Hydrogen burns with a pop sound because of which there is condensation in the test tube.
4. Milky solution is formed]]> 2021-09-21 06:54:54 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756299804 https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756300483 1) effervescence takes place as a gas is liberated
2) exothermic reaction as heat is given out
3) a milky solution is  seen
4) after bringing a burner , it extinguishes with pop sound . showing that Hydrogen is released

]]> 2021-09-21 06:55:18 UTC https://padlet.com/subhoshree15/Observations2021Grade9D/wish/1756300483