Chemistry 10th Grade

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Across
  1. 1. A scale measuring the acidity or alkalinity of a solution, ranging from 0 (acidic) to 14 (basic).
  2. 3. The smallest unit of matter that retains the properties of an element.
  3. 5. A negatively charged subatomic particle that orbits the nucleus of an atom.
  4. 7. A group of atoms bonded together, representing the smallest unit of a chemical compound.
  5. 8. An atom or molecule with a net electric charge due to the loss or gain of electrons.
  6. 9. A substance that accepts protons (H⁺ ions) or donates electrons in a chemical reaction.
  7. 12. A process where substances (reactants) transform into new substances (products).
  8. 13. A substance formed when two or more elements are chemically bonded together.
Down
  1. 1. A positively charged subatomic particle found in the nucleus of an atom.
  2. 2. Refers to the periodic table, which organizes elements by atomic number and properties.
  3. 4. The amount of matter in an object, often measured in grams or kilograms.
  4. 5. A pure substance consisting of only one type of atom, defined by its atomic number.
  5. 6. A neutral subatomic particle found in the nucleus of an atom.
  6. 10. A substance that donates protons (H⁺ ions) or accepts electrons in a chemical reaction.
  7. 11. A force that holds atoms together in a molecule, such as ionic or covalent bonds.