There's a massive improvement in the layout, to begin with. Elements are frequently colour-coded to differentiate between their physical properties.
Mendeleev's periodic table has no place for isotopes, and also placed dissimilar atoms together in groups.
<span>Mendeleev also left gaps for elements he suspected would be discovered, but he did not have the equipment to discover. These were later discovered through things like electrolysis. These days these unknown elements are not so evenly spread, but are mostly found around unununium.</span>
It would be D because there is more gravitational forces acting on it than a small block of wood
The answer is Helium Flash.
A helium flash marks the looming end of a red giant. As a red giant expands in its outer layers, its core is actually contracting. The core would eventually form a white dwarf.
As the core reaches a certain temperature, helium will start to fuse to form carbon. As this occurs, the fusing of helium, the core heats up. The core is not able to expand to cool down, so the reaction increases the core until the core will ultimately explode.
Density- It is a measurement of that how material is packed together tightly.
Its formula is ρ=m/v
where ρ is the density of material
m is the mass
v is the volume
here we have to find the length of cube's side
a cube of silver has a mass = 21 kg. = 21×10³ [∵1kg = 1000g ]
density of silver = 10.49g/cm³
the length of the cube's side = ?
v=m/ρ
l³ = 21×10³ /10.49 ≈ 2×10³ cm³
l =∛(2×10³)cm³
l = 1.26 ×10 = 12.6 cm
l = 4.96 inches [∵ 1 cm = 0.394 inch ]
the length of the cube's side is 4.96 inches
to know more about density :
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