Chemistry - Year 10 - Crossword Labs

1. A reaction in which two or more reactants bond together to form a single product
2. A reaction in which a substance burns in the presence of oxygen, producing heat and light
3. A reaction that consumes heat energy, and so feels cold
5. The law of conservation of mass states that _____ cannot be created or destroyed
6. A diagram in which the electron configuration is drawn
9. The outermost electron shell
10. Groups of elements on the periodic table that run horizontally; the number tells you how many electron shells the atoms have
12. The type of combustion in which the flame does not have access to enough oxygen; the flame is cool, yellow and ‘dirty’ (it produces solid carbon)
14. A reaction that produces heat
18. A reaction in which two soluble chemicals produce an insoluble solid
19. The energy of movement
21. A chemical that speeds up a chemical reaction, without using being used up in the reaction
26. The poisonous gas produced by incomplete combustion
27. The scientific word for stirring or shaking
28. A reaction in which an acid and a base neutralise each other, forming a salt and water

1. The scientific word for how many atoms are found in a chemical; if we increase the number of atoms then the rate of the reaction will be increased
4. If we decrease the space between ________ , the rate of the chemical reaction will be increased
7. The chemicals found on the left-hand side of a chemical equation
8. A reaction in which a single reactant breaks down into two or more products
11. A way of summarising what happens in a chemical reaction
13. The term used to describe how many electrons an element has, and which shells they are found in
15. The region in the middle of an atom where the protons and neutrons are found
16. A reaction in which oxygen combines with a metal to form a metal oxide; rust is an example
17. The chemical reaction that happens in the cells of your body; glucose and oxygen are combined to form carbon dioxide, water and energy
20. The solid formed in a precipitation reaction
22. Groups of elements on the periodic table that run vertically; the number tells you how many electrons are found in their outermost shells
23. The chemicals found on the right-hand side of a chemical equation
24. The energy found in chemical bonds
25. The number that tells you how many electrons an element has (assuming it isn’t an ion)
26. The type of combustion in which the flame has access to plenty of oxygen; the flame is hot, blue, and produces carbon dioxide and water