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"Balancing Chemical Equations - Abdullah Naeem": HTML5 Crossword

Across

1. A pure substance that is made of one type of atom (7)
5. Shows us substances involved in a chemical reaction (8,8)
6. A type of reaction in which an element reacts with a compound to form a new compound and a different element (6,11)
7. A type of chemical reaction in which two or more reactants form a single product (9)
10. The arrow that shows the reactants turning into products (5)
13. When a chemical reaction occurs, the mass of the product should be equal to the mass of the reactants (3,2,12,2,4)
14. The substances that undergo chemical changes (9)
19. A type of chemical reaction in which a single substance is broken down into two or more products (13)

Down

2. A chemical reaction that requires heat (11,8)
3. A group of atoms (9)
4. Anything that has mass and takes up space (6)
8. A shorter form of a substance (6)
9. A Balanced equation occurs when the number of atoms involved in the reactants side is _______ to the number of atoms in the products side (5)
11. A measure of the amount of matter in an object (4)
12. A type of reaction in which two compounds exchange elements or molecules with one another (6,11)
15. The most basic and small unit of structure and life which is the building blocks of the universe (5)
16. A number that gets placed in front of a chemical formula (11)
17. A number underneath an element in a chemical equation that describes how many atoms of each element are in there (9)
18. The new substances that form from the chemical change (8)

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