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The history of ancient Egypt occurred as a series of stable kingdoms, separated by periods of relative instability known as Intermediate Periods: the Old Kingdom…

Concept of Tax Taxation is the biggest source of the public revenue of the government. A nation requires sufficient funds to carry out development plans,…

An atomic mass unit (abbreviated: amu, u, or Da) is a unit of measurement that is used to measure the mass of atoms. The atomic…

“Ħaġar Qim” (Maltese pronunciation: [ħadʒar ˈʔiːm]; “Standing/Worshipping Stones”), is a megalithic temple complex, which is located on the southwest coast on the Mediterranean island of…

The atomic number (symbol: Z) of an atom is the number of protons in the nucleus of the atom. Atoms of each element contain a…

Atomic orbitals are the places surrounding the nucleus of an atom where the electrons are most likely to be at any given time. They are the…

Atomic Nucleus The atomic nucleus is a tiny massive entity at the center of an atom. It is the central area of the atom. It…

“Palenque” (Spanish pronunciation: (pa’leŋke); Yucatec Maya: Bàakʼ /ɓàːkʼ/), also anciently known as Lakamha (literally: “Big Water”), was a Mayan city of the Late Classic Period…

Radioactive decay Radioactive decay is the spontaneous breakdown of an atomic nucleus resulting in the release of energy and matter from the nucleus. Some elements,…

Apoptosis is the controlled death of a cell. It is a form of programmed cell death, or “cellular suicide”. It plays an integral part in…

“Machu Picchu” (English: /ˈmɑːtʃuː ˈpiːktʃuː/ or /ˈpiːtʃuː/, Spanish: ˈmatʃu ˈpi(k)tʃu; Quechua: Machu Pikchu [ˈmatʃʊ ˈpɪktʃʊ]), also spelled ‘Machupijchu’, site of ancient Inca ruins located about…

Tax is a permanent instrument for collecting revenues. The primary purpose is to raise revenue to meet huge public expenditure. It is a major source…