Add of distilled water at room temperature to a clean test tube and add a spoonful of sodium thiosulfate pentahydrate . Stopper the test tube and shake . If all the crystals dissolve add one more spoonful and shake again. Using the terms SATURATED or UNSATURATED , describe this solution. Keep this for procedure 10. If you added additional sodium thiosulfate solid to this mixture would you expect it to dissolve ? Explain .

we need the questions , i may then you.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.