Bacon

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Across
  1. 2. A person's condition with regards to their emotional wellbeing
  2. 5. Mental action or the process of acquiring knowledge through thought, understanding, experience and the senses
  3. 7. An element that radiates positively charged particles
  4. 8. Effect caused by the friction of two materials
Down
  1. 1. An x-ray of blood vessels
  2. 3. A set of instruction
  3. 4. A complex mixture of hydrocarbons that occur naturally in a liquid, gas or solid form
  4. 6. General state of the environment around DNA