مِثْقَالَ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – مِثْقَالَ is a noun

A noun may either be 1) Definite or indefinite 2) Masculine or feminine 3) Singular, dual or plural 4) Nominative, accusative or genitive

مِثْقَالٌ is the natural state of this indefinite noun and it becomes مِثْقَالًا due to it being the: 1) المَفْعُوْلُ بِهِ object of a verb or 2) اسْمُ of إِنَّ or 3) خَبَرُ of كَانَ or 4) المَفْعُوْلُ فِيْهِ adverb of time or place or 5) المَفْعُوْلُ لَهُ noun that gives the reason for doing a thing or 6) المَفْعُوْلُ مَعَهُ noun that comes after the و which means “along with” or 7) المَفْعُوْلُ المُطْلَقُ is the مَصْدَرٌ of the verb occurring in the sentence or 8) الحَالُ adverb of manner or 9) التَّمْيِيْزُ noun that specifies the meaning of a vague word or 10) المُسْتَثْنَى noun that comes after إِلَّا meaning “except” or 11) المُنَادَى noun of calling or 12) it’s a noun of dependent declension a) نَعْتٌ / صِفَطٌ adjectives b) التَّوْكِيْدُ emphatic c) المَعْطُوْفٌ conjunction d) البَدَلُ synonym

مِثْقَالًا loses it’s indefinite article, becoming مِثْقَالَ due to it being a possessed noun

Heavy / Weight

To be heavy, weighty, slow, dull, sluggish, difficult, hard, grievous

النَّكِرَةُمُفْرَدٌمُذَكَّرٌمَنْصُوْبٌث ق لبَاب كَرُمَمِفْعَالٌثَقُلَ يَثْقُلٌاسْمٌالْاِسْمُ الْآلَة
IndefiniteSingularMasculineAccusativeRootWeightPatternكNounUtilitarian noun
Surah/Below are the 6 verses in the holy Quran containing the nounمِثْقَالَ
Verse
Indeed Allah (SWT) does not wrong the weight of an atom and if there is a goodإِنَّ اللهَ لَا يَظْلِمُ مِثْقَالَ ذَرَّةٍ وَإِنْ تَكُ حَسَنَةً
4-40He doubles it and gives from near Him a great rewardيُضَاعِفْهَا وَيُؤْتِ مِنْ لَّدُنْهُ أَجْرًا عَظِيْمًا
21-47
31-16
34-22
99-7So who does an atoms weight of good will see itفَمَنْ يَعْمَلْ مِثْقَالَ ذَرَّةٍ خَيْرًا يَرَهُ
99-8and who does an atoms weight of evil will see itوَمَنْ يَعْمَلْ مِثْقَالَ ذَرَّةٍ شَرًّا يَرَهُ