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6. What is a neutron

  • A component of the nucleus with a relative mass number of 1 and no charge
  • A component of the nucleus with a relative mass number of 1 and a positive charge
  • A component of the nucleus with a relative mass number of 1 and a negative charge

7. Ion

  • An electrically charged atom, or goup of atoms formed by the loss or gain of one or more electrons
  • A substance composed of two or more elements
  • A class of substances that cannot be seperated into simpler substances by chemical means

8. What is a nucleus

  • The centre of an atom composed of protons and neutrons possessing 89.9% of the mass
  • The centre of an atom composed of protons and neutrons, possessing 99.9% of the mass
  • the centre of a n atom composed of protons and neutrons, possessing 90% of the mass

9. Element

  • A class of substances that cannot be seperated into simpler substances by chemical means
  • A group of atoms or an electrically charged atom formed by the loss or gain of one or more electrons
  • A substance composed of two or more elements

10. What is Kinetic Energy

  • a measure of how fast reactants become products
  • energy that an object possesses by being in motion
  • Total area of exposed surfaces

11. What is the atomic number

  • The number of electrons in the nucleus of an atom. Places it on the periodic table
  • The number of protons in the nucleus of an atom. Places it on the periodic table
  • The number of neutrons in the nucleus of an atom. Places it on the Periodic table

12. What is a compound

  • A class of substances that cannot be seperated into simpler substances by chemical means
  • A substance composed of two or more elements
  • An electrically charged atom or group of atoms, formed by the loss or gain of one or more electrons

13. What is an atom?

  • least amount of energy required to start a chemical reaction
  • is the defining structure of an element. cannot be broken by any chemical means
  • that speeds up a chemical reaction but is not used up in that reaction

14. What is an Anion

  • A negatively charged atom or group of atoms caused by losing one or more electrons
  • A positively charged atom or group of atoms caused by an atom or group of atoms losing one or more electrons
  • A neutrally charged atom or group of atoms caused by losing one or more electrons

15. What is a catalyst?

  • is the defining structure of an element. cannot be broken by any chemical means
  • a substance that speeds up a chemical reaction but is not used up in that reaction
  • least amount of energy required to start a chemical reaction

16. What is collision theory

  • The theory that in order for a chemical reaction to occur two or more particles must collide with sufficient energy and at the correct orientation
  • The theory that matter is made up of tiny particles which are constantly moving
  • is the measure of how much there is of a given substance

17. What is concentration

  • The theory that in order for a chemical reaction to occur two or more particles must collide with sufficient energy and at the correct orientation
  • is the measure of how much there is of a given substance
  • The theory that matter is made up of tiny particles which are constantly moving

18. What is a proton

  • component of the nucleus with a relative mass number of 0 and charge of 0
  • Component of the nucleus with a relative mass number of 1 and charge of +1
  • component of the nucleus with a relative mass number of 1 and a charge of -1

19. What is the atomic mass

  • The total number of protons and electrons in the nucleus
  • The total number of protons and neutrons in the nucleus
  • The total number of electrons and neutron in the nucleus

20. What is activation energy?

  • is the defining structure of an element. cannot be broken by any chemical means
  • least amount of energy required to start a chemical reaction
  • a substance that speeds up a chemical reaction but is not used up in that reaction