Describe the results of Ernest Rutherford's gold-foil experiment and explain how his results changed ideas about the distribution of positive charge within the atom.
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His results changed the idea for distribution of positive charges as he concluded almost all the positive charge is in center of the atom (inside nucleus) and it is very heavy than electrons which revolves outside the nucleus
Hope this helps!
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Number of electrons in the outer ring of bromine
At which temperature and pressure would a sample of helium behave most like an ideal gas?1 75 K and 500 kPa 2 150. Kand 500 kPa 3 300. Kand 50 kPa 4 600. K and 50 kPa Submit Answer
Select all that apply. The requirements for one type of atom to substitute for another in a solid solution are:a. All substitutions must be limited to the same element.b. An atom must be identical in size.c. An atom must be similar in size.d. The substituting atom must be from the same period. E) The substituting atom must be from the same group.
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Answer:
physical
Explanation:
because if you let it cool down it will turn back into its original form
solution of KOH, what is the concentration of
HNO3?
(1) 1.0 M (3) 3.0 M
(2) 1.5 M (4) 0.5 M
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Answer : The correct option is, (2) 1.5 M
solution :
According to the neutralization law,
where,
= molarity of
solution = ?
= volume of
solution = 50 ml
= molarity of KOH solution = 0.50 M
= volume of KOH solution = 150 ml
Now put all the given values in the above law, we get the volume of solution.
Therefore, the concentration of is, 1.5 M
B. metallic bonding
C. ionic bonding
D. dipole forces
E. van der Waals forces (London dispersion forces)
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a) They are solid at ambient temperatures of 25 ° C and pressure of 1 atm.
b) Ionic compounds represent high temperature melting and boiling.
c) They are hard and brittle and then subjected to the impact, break easily, creating planar faces.
d) When dissolved in water, or pure liquid, carry electrical current due to the existence of ions that move freely and can be attracted by the electrodes, closing the electric circuit.
e) His solvent is water.
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This is true because it reacts with oxygen