Across
- 3. a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction
- 7. the ability for a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium
- 10. chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns
- 12. chemical process in which substances act mutually on each other and are changed into different substances, or one substance changes into other substances
- 14. The rate at which an atom, molecule, or compound tends to undergo a chemical reaction with another atom, molecule, or compound
- 15. An atom or a molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge
- 16. occurs when a system is in its lowest energy state, or chemical equilibrium with its environment, e.g. when the outer electron shell is full
- 17. A bond where the transfer of electrons from a metal to a non-metal allows for both atoms to obtain a full valence shell
- 19. A group of elements that are malleable, conduct heat and electricity and often positively charged they will bond with something negatively charged to form an ionic bond
Down
- 1. Something you have to do to equations where it looks like matter has simply appeared or disappeared on the reactant side - remember chemistry is not magic
- 2. Each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter. Each one is distinguished by its atomic number, i.e. the number of protons in the nuclei of its atoms
- 4. Gas A group of elements with very similar properties. Under standard conditions, they are all odourless, colourless, monatomic gases with very low chemical reactivity
- 5. a substance formed when two or more chemical elements are chemically bonded together
- 6. a way of writing that tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound, as well as how many there are for each element in the form of subscripts
- 8. A facility with controlled conditions where scientific research, experiments, and measurements can be performed.
- 9. the ability or power to conduct or transmit heat, electricity, or sound
- 11. A very small part of an atom that gives a negative charge
- 13. The smallest particle of an element that can exist by itself or be combined with other atoms to form a molecule.
- 18. An element that is a highly reactive non-metal and oxidising agent. In it's most stable for there will be two of it (i.e. two atoms of this element) making up the molecule.