Question

The elements of a period and their atomic number are given;
Element
Li
Be
B
C C
N
atomic number
3
4
5
6
7
The valency of the elements can be known;
a. Number of valence electrons present in the outer shell of an atom
b. Number of electrons present in the atom
c. Number of valence electrons present in the first two shells of an atom
d. Number of valence electrons present in the nucleus of an atom​

Answer 1

Answer:

Column 1 Column 2 Column 3

i. Triad

ii. Octave

iii.Atomic number

iv. Period

v. Nucleus

vi. Electron a. Average of the first and the third atomic mass

b. Properties of the eighth element similar to the first

c. Positive charge on the nucleus

d. Sequential change in molecular formulae

e. Concentrated mass and positive charge

f. Lightest and negatively charged particle in all the atoms

Explanation:

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Answer 2

Answer:

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