Question

Why do we always see the same side of
the Moon?
​

Answer 1

the moon takes 27days to complete one rotation. it also takes 27days to complete one revolution around the earth.

taht is why we see the same side of the moon always.

answer is in dav model school class 6 sst book ch 1.

hope this helps you dear

please mark as brainliest

Answer 2

Answer:

Explanation:

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\text{\huge\underline{\red{Question:-}}}

Question:-

:\Longrightarrow⟹ The atomic number of an element ‘X’ is 13 and its mass number is 27. Answer the following questions based on the element.

a) Write the electronic configuration

b) Locate the group and period of the element in the periodic table.

c) Identify its nature and valency.

\text{\huge\underline{\orange{Given:-}}}

Given:-

:\Longrightarrow⟹ The atomic number of an element ‘X’ is 13 and its mass number is 27. Answer the following questions based on the element.

\text{\huge\underline{\green{To\ find:-}}}

To find:-

:\Longrightarrow⟹ ● Electronic configuration.

:\Longrightarrow⟹ ● Group and period.

:\Longrightarrow⟹ ● Nature and valency.

\text{\huge\underline{\purple{Solution:-}}}

Solution:-

● \mathrm\blue{Electronic\ configuration\ of\ _{13}X²⁷}Electronic configuration of

13

X²⁷ ;

1s²2s²2p⁶3s²3p¹ or [Ne] 3s²3p¹ .

● \mathrm\blue{Group\ :\ 13.}Group : 13.

● \mathrm\blue{Periods\ :\ 2.}Periods : 2.

● \mathrm\blue{Valency\ :\ 3.}Valency : 3.

\text{\huge\underline{\bf{Hence,\ Verified}}}

Hence, Verified

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