Across
- 4. substance that takes part in and undergoes change during a reaction.
- 7. article or substance that is manufactured or refined for sale.
- 8. replacement- s a type of chemical reaction where an element reacts with a compound and takes the place of another element in that compound. This type of reaction is typically pictured like this: Here, A replaces B in the compound BC.
- 10. Combustion reactions always involve molecular oxygen O2. Anytime anything burns (in the usual sense), it is a combustion reaction. Combustion reactions are almost always exothermic
- 12. chemical decomposition produced by passing an electric current through a liquid or solution containing ions.
- 14. replacement- double replacement reaction or metathesis reaction, is a type of reaction that occurs when the cations and anions switch between two reactants to form new products.
- 15. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
- 16. ion- A polyatomic ion, as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit. The prefix poly- means "many," in Greek, but even ions of two atoms are commonly referred to as polyatomic.
- 17. produce or provide (a natural, agricultural, or industrial product).
- 18. the process or result of oxidizing or being oxidized.
- 19. They are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine and astatine.
Down
- 1. combination or composition, in particular.
- 2. equation- A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.
- 3. compound- A binary compound is a chemical compound that contains exactly two different elements. [1] Examples of binary ionic compounds include calcium chloride (CaCl2), sodium fluoride (NaF), and magnesium oxide (MgO), whilst examples of binary covalent compounds include water
- 5. of or containing water, typically as a solvent or medium.
- 6. cause (an event or situation, typically one that is bad or undesirable) to happen suddenly, unexpectedly, or prematurely.
- 9. A number or symbol multiplied with a variable or an unknown quantity in an algebraic term. For example, 4 is the coefficient in the term 4x, and x is the coefficient in x(a + b). A numerical measure of a physical or chemical property that is constant for a system under specified conditions.
- 11. the state or process of rotting; decay.
- 13. Reduction Definition. A half-reaction in which a chemical species decreases its oxidation number, usually by gaining electrons. The other half of the reaction involves oxidation, in which electrons are lost. Together, reduction and oxidation form redox reactions (reduction-oxidation = redox)