Facts about elements

Fact to remember	Name of the element
An element is defined by the IUPAC as a pure chemical substance composed of atoms with the same number of protons in the atomic nucleus. All atoms of an element have the same number of protons.
Atoms of elements can have different number of electrons and neutrons.
A variant of an element with different number of neutrons is known as its	Isotope
Different physical form of an element is known as its (e.g. graphite and diamond)	Allotrope
Element most abundant in the Universe	Hydrogen
Element most abundant in the human body	Oxygen
Element which forms more than 10 million compounds	Carbon
Element with the lowest melting and boiling point	Helium
Element with the highest melting point	Carbon
Element with the highest boiling point	Tungsten
Element with highest density	Osmium
Element with lowest density	Hydrogen
Element with highest electronegativity	Flourine
Element with lowest electronegativity (highest electropositivity)	Francium
The first element to be produced artificially	Technitium
The most corrosion resistant element (which cannot be affected by water, chemicals or acids)	Iridium
The element which was discovered on the Sun before it was found on the Earth	Helium
The non-metallic element which is liquid at room temperature	Bromine
The metallic element which is liquid at room temperature	Mercury
The most reactive element	Flourine

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electronic configuration of all elements in SPDF format

Element Electrons Electronic Configuration Hydrogen (H) 1 1s 1 Helium (He) 2 1s 2 Lithium (Li) 3 1s 2 2s 1 Beryllium (Be) 4 1s 2 2s 2 Boron (B) 5 1s 2 2s 2 2p 1 Carbon (C) 6 1s 2 2s 2 2p 2 Nitrogen (N) 7 1s 2 2s 2 2p 3 Oxygen (O) 8 1s 2 2s 2 2p 4 Fluorine (F) 9 1s 2 2s 2 2p 5 Neon (Ne) 10 1s 2 2s 2 2p 6 Sodium (Na) 11 1s 2 2s 2 2p 6 3s 1 Magnesium (Mg) 12 1s 2 2s 2 2p 6 3s 2 Aluminum (Al) 13 1s 2 2s 2 2p 6 3s 2 3p 1 Silicon (Si) 14 1s 2 2s 2 2p 6 3s 2 3p 2 Phosphorous (P) 15 1s 2 2s 2 2p 6 3s 2 3p 3 Sulfur (S) 16 1s 2 2s 2 2p 6 3s 2 3p 4 Chlorine (Cl) 17 1s 2 2s 2 2p 6 3s 2 3p 5 Argon (Ar) 18 1s 2 2s 2 2p 6 3s 2 3p 6 Potassium (K) 19 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 Calcium (Ca) 20 1s 2 2s 2 2p 6 3s 2 3...

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ALL THE INFORMATION HAS BEEN TAKEN FROM WIKIPEDIA MESOPOTAMIAN CIVILIZATION Mesopotamia is a historical region of Western Asia situated within the Tigris–Euphrates river system , in the northern part of the Fertile Crescent , in modern days roughly corresponding to most of Iraq , Kuwait , the eastern parts of Syria , Southeastern Turkey , and regions along the Turkish–Syrian and Iran–Iraq borders . [1] The Sumerians and Akkadians (including Assyrians and Babylonians ) dominated Mesopotamia from the beginning of written history (c. 3100 BC) to the fall of Babylon in 539 BC, when it was conquered by the Achaemenid Empire . It fell to Alexander the Great in 332 BC, and after his death, it became part of the Greek Seleucid Empire . Around 150 BC, Mesopotamia was under the control of the Parthian Emp...

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