Othu['oi;eejlktmkolhkjdfm;hojnor;'mor;'mor;'mor;'mor;'mor;'mhim
Answer:
1)Around 450 B.C., the Greek philosopher Democritus introduced the idea of the atom.
2)All matter is made of atoms, Atoms are indivisible and indestructible.Compounds are formed by a combination of two or more different kinds of atoms, A chemical reaction is a rearrangement of atoms.
3)B
Explanation:
Answer:
No, a mole of oxygen is about 16 grams
Explanation:
Answer:
Energy decreases and wavelength gets longer.
Explanation:
The energy of a wave is given by :

Where
h is Planck's constant
f is the frequency of the wave
As frequency decreases, the energy of the wave also decreases and wavelength gets longer. Hence, the option is (d).