1A H2A Li Be 3A 4A 5A 6A 7A He B C N 8A O Hf Ta W Re Os Ir Pt Au Hg Tl F Ne Na Mg 3B 4B 5B 6B 7B Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Pd Ag Cd In Sn Sb Te I Xe Rb Sr Y Zr Nb Mo Tc Ru Rh Cs Ba La Fr Ra Ac Rf Ha Pb Bi Po At Rn Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr The element with an electron configuration of 1s22s²2p63s23p64s²3d8 is in group The element with an electron configuration of 1s22s²2p63s23p64s23d¹04p5 is in group and period and period
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.

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