Ionic crystals are hard because of tight packing lattices, say, the positive and negative ions are strongly attached among themselves.
Answer:
C= 24 atoms
H= 48 atoms
O=24 atoms
Explanation:
4C6H12O6
Carbon atoms: 4 × 6 = 24
Hydrogen atoms: 4 × 12 = 48
Oxygen atoms: 4 × 6 =24
Answer:
The answer to your question is letter b) He and Ne
Explanation:
Elements that have similar properties are placed in the same group in the periodic table.
So
A C and F These elements do not have similar properties because C is in group 4A and F is in group 7A. This is not the right answer.
B He and Ne These elements have similar properties becase they are in the same group (8A).
C Al and Si These elements do not have similar properties because Al is in group 3A and Si is in group 4A. This is not the right answer.
D N and S These elements do not have similar properties because N is in group 5A and S is in group 6A. This is not the right answer.
Answer:
photons are emitted per second in a 
Watt microwave oven.
Explanation:
The expression for the power is:-
Also, 
Where,
n = the number of photons
h = Plank's constant having value 
c = the speed of light having value 
= the wavelength of the light
So,
Thus, the expression for photons per second is:-
Given that:-
Power = 10³ Watt
( 1 cm = 0.01 m)
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So,
photons are emitted per second in a Watt microwave oven.
