Answer:
the answer to your question is B
Lithium is one of element of group 1 of periodic table.
Lithium has the smallest radius than as compared to the other elements, thus the density of the alkali metal is also less.
Lithium when added to water it floats, because of lower density. It eventually fizzes and becomes smaller.
The reaction on lithium and water is:
2Li + 2H₂O --> 2LiOH + H₂ (g)
The hydrogen gas which is liberated is highly flammable.
Thus, lithium salts are insoluble in water.
Density is defined as the mass of a substance per unit volume.
Density = Mass ÷ Volume.
To know more about Alkali metals, refer to this link:
brainly.com/question/5063184
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Answer:
The correct answer is - Positive charge occupies a very small volume in the atom.
Explanation:
Ernest Rutherford's experiments exhibited the presence of the nuclear core: a small region with the greater part of the mass of the atom and the positive charge.
Rutherford's gold foil analyze gave three conclusions:
- the particle is generally vacant space
- in it is a little, thick core or dense nucleus
- the core is positively charged.
Answer:
I think
Explanation:
Li = 2s^1
Be = 2s^2
B = 2p^1
C = 2p^2
I think that is what it is asking if not sorry
Dimension of the salt crystal is:
Length = 3.22 x 10^-2 cm
Breadth = 1.5 x 10^-4 cm
Height = 4.30 x 10^-3 cm
So it is cuboidal in shape.
Volume = L × B × H
