Answer: electronegativity
Explanation:
Electronegativity is defined as the property of an element to attract a shared pair of electron towards itself.
The size of an atom decreases as we move across the period because the electrons get added to the same shell and the nuclear charge keeps on increasing. Thus the electrons get more tightly held by the nucleus.
As, the size of an element decreases, the valence electrons come near to the nucleus. So, the attraction between the nucleus and the shared pair of electrons increases and thus the electronegativity increases.
Answer: 2*10^-3 nC
Explanation: The capacitor of two plates is given by C= εoA/d where A and d , are the area and the separation of the plates, respectively.
We also know that C=Q/V and V=E*d ( E=electric field between the plates)
From the above expression we have:
Q= εo*A*E= 8.85 ^10-12*7.54 * 10^-4*300= 2*10^-3 nC
Answer: The water in the pool is acidic
Explanation:
The pH level indicates the concentration of hydrogen ions in a solution and is setted in a scale from 0 (which is acid) to 14 (which is alkaline), being 7 the neutral value.
In this context, the normal pH level in a pool's water must be between 7.2 and 7.6
. So, since this pool's water pH is 6.5 we can say the water is acidic.
It is important to note that this may lead to skin and eyes irritation of the bathers, instability of chlorinated products and corrosion in the metal parts of the pool that are in contact with this water.