# silverwind

Members

18

## Profile Information

• Favorite Area of Science
nuclear pysics,biochem.,robotics

-1

1. ## electron excitation and valency

i've studied that if given energy,electrons can jump orbits.so if i give energy to an atom with config. 2,8,8 ,will it become 2,7,9?if yes will its valency change? thanks.
2. ## valency!?

thank you,what will be the valency of an ion like X-2?will it be -2,or +2
3. ## valency!?

i am totally confused on this concept!how is valency determind?how can we have H- and H+,what is their valency,how to tell valency of an atom,octet rule,would somebody plz help me?how does it work,and how are symbols assigned.need urgent help!!!exam after three days!! being more specific,i want to know about the positive and negative signs in valency.for example,in an equation, we write cl as cl-. why?and so on.i want to know how are these positive and negative signs determined.thnx
4. ## valency!?

i am totally confused on this concept!how is valency determind?how can we have H- and H+,what is their valency,how to tell valency of an atom,octet rule,would somebody plz help me?how does it work,and how are symbols assigned.need urgent help!!!exam after three days!!
5. ## how is antimatter formed?

how is antimatter formed?does it contain negative energy?does it have negative mass?
6. ## how much energy is ther in universe?

is the total enrgy in the universe constant,or a variable?if it is a constant,exactly how much is there and where did it come from?is it zero?if it varies,then waht makes it to vary?if it is zero,and we assume that the energy of universe is constant,at the time of big bang,the energy was zero,so what prompted big bang. sorry,i dont know much about theoritical physics.after all,i'm just a 9th grader!
7. ## how does a cell die?

"Death is irreparable damage to an entity that causes the permanent cessation of its activity" IF we make out some way to repair all the damage and keep healing the cell,we can defeat death??
8. ## slope problem

topic closed!!!
9. ## slope problem

if a ball of mass 1 kg with horizontal force of 10N climbs up a slope of 60o what will be its total force?i mean the hori. component is known,mass is known,even the angle is known,how to find verticle component and force by which it is climbing up
10. ## can we electrolyse hydrogen

so,does this mean that we can create deuterium by ionizing hydrogen and firing neutrons at it so that neutrons will combine with now free protons to make a 2H nucleus,which by gaining an electron can give us deutrium?
11. ## can we electrolyse hydrogen

well,what is a bystander?sorry,if the question is silly,im a newbie.
12. ## can we electrolyse hydrogen

would a neutron fuse with a free proton and an electron to get deutrium?
13. ## can we electrolyse hydrogen

can we break hydrogen into proton and electron by electrolysis?i dont care if it'd again become h2 at electrodes again.can we break it?
14. ## how to program robots?

is there some special hardware available to program microcontrollers?
15. ## how to program robots?

suppose you have created a program for your robot.how do you get that prog work in the robot?how do you program the robot?im sorry if this is a silly question,im a noob.
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