Malleability described the property of physical deformation under some compressive stress; a malleable material could, for example, be hammered into thin sheets. Malleability is generally a property of metallic elements: The atoms of elemental metals in the solid state are held together by a sea of indistinguishable, delocalized electrons. This also partially accounts for the generally high electrical and thermal conductivity of metals.
In any case, only one of the elements listed here is a metal, and that’s copper. Moreover, the other elements (hydrogen, neon, and nitrogen) are gases under standard conditions, and so their malleability wouldn’t even be a sensible consideration.
1. Take 100ml of water as solvent and boil it few minutes.
2. Now add one tea spoon sugar, one tea spoon tea leaves and 50ml of milk. Here sugar, tea leaves and milk are solute.
3. Now boil it again for few minutes so that sugar will dissolves in solution as sugar is soluble in water
4. Now filter the solution. Collect the filtrate in cup. The insoluble tea leaves will be left behind as residue.
Answer : The unit of 
in mol/L.mm Hg is, 
Explanation :
As we know that the is the Henry's Law constant for argon at 
is, 
Now we have to determine the unit of in mol/L.mm Hg
Conversion used for pressure from atm to mmHg is:
1 atm = 760 mmHg
So,
Thus, the unit of in mol/L.mm Hg is,
Answer:
chlorine (ci)
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Answer:
Choice A: carbon-12, 
.
Explanation:
- The number on the top-left corner of each particle is its mass number.
- The number on the lower-left corner of each particle is its atomic number.
Let
- the mass number of X be A, and
- the atomic number (a.k.a. proton number) of X be Z.
Symbol of X: 
.
Consider the two conservation laws:
- Sum of mass numbers on the left-hand side = Sum of mass numbers on the right-hand side.
- Sum of atomic numbers on the right-hand side = Sum of atomic numbers on the right-hand side.
Sum of mass numbers:
- Left-hand side: 9 + 4;
- Right-hand side: A + 1.
Equate the two sides:
.
Thus the mass number of X is 12.
Try the steps above to find the atomic number of X. The number 
on the lower-left corner of 
indicates that the atomic number of this neutron is zero.
.
Thus the atomic number of X is 6.
What element is X? Refer to a modern periodic table. The element with atomic number 6 is carbon. The symbol for carbon is 
. The mass number of this isotope is 12. The answer will be .
