A-Catalyst 2022

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Across
  1. 3. The reactants that is completely consumed in a chemical reaction and limits the amount of products formed
  2. 6. 2 or more atoms of the same element with the same proton number but differ in nucleon number
  3. 10. Name of principle about electron filled the atomic orbital with lowest energy first before occupy the one with higher energy
  4. 11. A homogenous mixture of two or more substances
  5. 14. A chemical substance is a form of matter having constant chemical composition and characteristic properties
  6. 18. 3D region around the nucleus of an atom where there is a high probability of finding an electron.
  7. 19. A rule which states that atoms tend to gain, lose or share electrons until they are surrounded by eight valence electrons
  8. 20. A horizontal row of elements in periodic table
  9. 21. A combination of 2 or more substances in which the substances retain their chemical properties
  10. 22. are chemically the simplest substances and hence cannot be broken down using chemical reactions
  11. 23. The exclusion principle about no two electrons in an atom can have same set of 4 quantum numbers.
Down
  1. 1. the rule thats when electrons are filling to the orbital of equivalent energy, each orbital are filled singly with electron of the same spin first before pairing up.
  2. 2. A substance composed of atoms of two or more ELEMEN chemically combined in a fix proportion.
  3. 4. The symbol of an element that includes dots to represent valence electron of an atom of the element
  4. 5. A vertical column of elements in periodic table
  5. 7. Anything that occupies space and has a mass
  6. 8. Redistribution of the energy of orbitals of individual atoms to give orbitals of equivalent energy happens when two atomic orbitals combine to form a hybrid orbital in a molecule
  7. 9. The study of quantitative relationship between the reactants and products of a chemical reaction
  8. 12. a three dimensional description of the most likely location of an electron around an atom
  9. 13. A covalent bond in which both of the electrons of the bonding pair are contributed by one of the two bonded atoms
  10. 15. The path of an electrons as it travels around the nucleus of an atom
  11. 16. The amount of a substance that contains the same number of particles that exists in exactly 12 g of C-12
  12. 17. Atom bonded to the central atom of molecule/ ion