Answer : Option A) The lattice energy increases as cations get smaller, as shown by LiF and KF.
Explanation : It is observed that lattice energy is mostly influenced by two main factors of an ionic solid which are;
i) The charge on the ions - As the charge of the ions increases, the lattice energy is observed to increase too.
and
ii) The radius, or size, of the ions - As the size of the ions increases, the lattice energy decreases with it.
So, here in this question the second reason is clearly observed. Hence, it is self-explained that the size of the cations are decreased in the ionic solids the lattice energy increases.
Answer:
13. 
This is a double displacement reaction, not an acid-base reaction
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Explanation:
All acid-base reaction have the same products, 
and a salt. Whit this in mind the acids would the compounds that produces the hydronium ion 
and the bases would be the compounds that produces the hydroxide ion 
God had warned Noah of the flood and directed him to build an ark. Noah had faith in God and began building.
Answer:
The amount of motion of these particles depends on the kinetic energy they possess. Particles with more kinetic energy move faster and farther apart. Particles with less energy move more slowly and stay closer together. The total kinetic energy of all the particles in a sample of matter is called thermal energy. Solids have the lowest kinetic energy as they are tightly packed and vibrate in place. Liquids have comparatively higher kinetic energy so the particles slide past each other. Gases have the most kinetic energy as a result they float around in the air.
Liquids have more kinetic energy than solids. When a substance increases in temperature, heat is being added, and its particles are gaining kinetic energy. Because of their close proximity to one another, liquid and solid particles experience inter-molecular forces.
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