I have noticed a sort of reoccuring theme in the Quran regarding Allah SWT referring to things being in pairs. I was wondering if you could explain to me the significance of this?

Holy Quran 51:49
وَمِن كُلِّ شَيْءٍ خَلَقْنَا زَوْجَيْنِ لَعَلَّكُمْ تَذَكَّرُونَ

And of all things We created two mates; perhaps you will remember.

So this verse indicates literally that source of every thing are pairs or from every thing a pair is produced , or every thing is in pairs.
From the atomic level we see the protons and electrons. To the galaxies which has ions If positive and negative charges.
Even in our morality there are positive attitudes and negative attitudes and so one, there is a lot one can ponder…
There are things in pair we have not yet discovered up till now
Holy Quran 36:36
سُبْحَانَ الَّذِي خَلَقَ الْأَزْوَاجَ كُلَّهَا مِمَّا تُنبِتُ الْأَرْضُ وَمِنْ أَنفُسِهِمْ وَمِمَّا لَا يَعْلَمُونَ

Exalted is He who created all pairs – from what the earth grows and from themselves and from that which they do not know.