Ionic compounds have very high melting and boiling point. This property tells us that the particles are bonded together by strong electrostatic forces of attraction. It is because of this very strong electrostatic forces that gives the compound high melting and boiling point.
Answer:
<u>The amount of energy required to increase temperature 275°C to 385°C is ΔQ =3.95208kJ</u>
Explanation:
Given :
- <em>The mass of the water vapour is 18 g</em>
- <em>The initial temperature : 275°C</em>
- <em>The final temperature : 385°C</em>
According to the formula :
Δ
Δ
Where ,
- <em>Δ
is the heat supplied</em> - <em>
is the mass of the substance (water vapour) = 18g</em> - <em>
is the specific heat of the substance ( water vapour) = 
</em> - <em>Δ is the change in temperature =
</em>
∴
ΔQ = 
⇒ΔQ =3.95208kJ
The plum pudding model of the
atom by the scientist Sir Joseph John Thompson or J.J. Thompson. It was
theorized after the discovery that electrons are present in the atom. In this
model, the atom is composed mainly of electrons. It was describe as plum
pudding because the electrons are dispersed within the atom. John Dalton
discovered the atom. Ernest Rutherford discovered the half – life of an atom
and Neils Bohr explain the quantum mechanics. So the answer is J.J. Thompson.
An equation for a word problem.
Answer:
All elements of period 7 are radioactive. This period contains the actinides, which includes plutonium, the naturally occurring element with the heaviest nucleus; subsequent elements must be created artificially.
Explanation:
hope u understand :)
