Answer:
it's a D answer if it's wrong please can you understand my question please
Answer:
See note in Explanation
Explanation:
The modern periodic table of the elements is arranged in order of increasing atomic numbers which is also in terms of the number of protons in the nucleus. That is, for any element listed on the periodic table its atomic number equals the number of protons in the nucleus. Thus, the element with 2 protons in its nucleus would be element #2 (Helium), element #3 (Lithium) has 3 protons in its nucleus and element #4 (Beryllium) has an atomic number 4 and contains 4 protons in its nucleus.
Also, this arrangement of elements finds that elements <u>below</u> elements 2, 3 & 4, Neon #10; sodium #11 & magnesium #12 have similar chemical and physical properties as does elements #2, #3 & #4. Such gives rise to the 'Periodic Law' => the chemical and physical properties of the elements is a periodic function of their atomic number (or, number of protons in the nucleus).
They do form directly on the equators
Answer:
12.5%
Explanation:
Given data:
Volume/Volume % = ?
Volume of solute = 25 mL
Volume of solution = 200 mL
Solution:
Formula:
v/v% = ( volume of solute / volume of solution ) × 100
by putting values,
v/v% = ( 25 mL / 200 mL) × 100
v/v% = 0.125 × 100
v/v% = 12.5%
The mass of nickel, Ni deposited when 0.2 faraday of electrical charge is passed through a solution of NiSO₄ is 5.9 g
