Calcium will lose 2 electrons to gain a full outer shell.
This will form a positive ion.
It is perpendicular to both as the sidelines are parallel
<span>The key difference between Mendeleev and modern periodic table is that Mendeleev’s periodic table was based on the increasing atomic masses while the modern periodic table is based on the increasing atomic numbers. Let us see here what is Mendeleev periodic table and what is modern periodic table, and then compare both to understand the difference between both periodic tables. Mendeleev is the pioneer of the modern periodic table, though a numerous number of changes had been made to the old version of the periodic table. Both of these attempts are equally important to the scientific community; because without an invention of the periodic relationship in elements, the modern developments in Science would not reach a development era as today. Before the invention of Mendeleev’s classification, there were several attempts made by several chemists, but their periodic laws were inadequate to apply for all the elements. The modern periodic table is so advantageous for the development in the Science.</span>
Answer 1 : The correct option is C.
Explanation :
The property of liquid is, they have fixed volume but do not have fixed shape. when a liquid is transferred from one container to another then the volume remains the same, but the shape changes according to the shape of the container.
Answer 2 : The correct option is A.
Explanation :
pH : It is defined as the negative logarithm of the hydronium ion concentration.
The expression of pH is,
![pH=-log[H_3O^+]](https://tex.z-dn.net/?f=pH%3D-log%5BH_3O%5E%2B%5D)
Yes its True. If we consider the electronegativity difference of Carbon and Bromine it is,
E.N of Bromine = 2.96
E.N of Carbon = 2.55
_________
E.N difference = 0.41
As the E.N difference is greater than 0.4 so this bond is slightly polar. And Bromine more electronegative than carbon will attract the electrons density towards itself making carbon partial positive, and itself partial negative.
