In כי תשא, Hashem says to Moshe in pasukim 12 and 13:
יבכִּ֣י תִשָּׂ֞א אֶת־רֹ֥אשׁ בְּנֵֽי־יִשְׂרָאֵל֘ לִפְקֻֽדֵיהֶם֒ וְנָ֨תְנ֜וּ אִ֣ישׁ כפר נַפְשׁ֛וֹ לַֽיהֹוָ֖ה בִּפְקֹ֣ד אֹתָ֑ם וְלֹא־יִֽהְיֶ֥ה בָהֶ֛ם נֶ֖גֶף בִּפְקֹ֥ד אֹתָֽם:יגזֶ֣ה | יִתְּנ֗וּ כָּל־הָֽעֹבֵר֙ עַל־הַפְּקֻדִ֔ים מַֽחֲצִ֥ית הַשֶּׁ֖קֶל בְּשֶׁ֣קֶל הַקֹּ֑דֶשׁ עֶשְׂרִ֤ים גֵּרָה֙ הַשֶּׁ֔קֶל מַֽחֲצִ֣ית הַשֶּׁ֔קֶל תְּרוּמָ֖ה לַֽיהֹוָֽה:
12"When you take the sum of the children of Israel according to their numbers, let each one give to the Lord an atonement for his soul when they are counted; then there will be no plague among them when they are counted. 13This they shall give, everyone who goes through the counting: half a shekel according to the holy shekel. Twenty gerahs equal one shekel; half of [such] a shekel shall be an offering to the Lord.
Question: Why does Hashem specifically say to give a Half Shekel ? Is there any significance or symbol for the specific amount ? Also, why is the Shekel given versus any other type of object? Is there any significance or symbol for the Shekel itself?
One Answer: a reason given by Chabad. Org for the use of a Half Shekel is that the Half Shekel was also the amount given in the time of Bais Hamikdash. Therefore, the Half Shekel can be seen as a symbol for the past, present, and future relationship between Hashem and His people