Friday, 3 February 2012

atoms

Answer: The difference between molecule of an element and molecule of a compound is that molecule of an element have same atoms like H[2] (highdrogen+highdrogen) and molecule of a compound have different atoms like CO[2] (1 carbon and 2 oxygen).           

Tuesday, 31 January 2012

atoms

Try It Out
Pg:145 of science text.
Name:Nabil siddiqui
Class:VII-M
From Bss Gulshan Middle Branch.

Answer-A:The element name is Sodium.
Answer-B:It's atomic number is "11".
Answer-C:The number of proton and electron is "11".
Answer-D:NO! I can't find the number of neutrons.