Basic Chemistry Worksheet - WordMint - Free Printable

Here is the step-by-step solution to match the chemistry terms with their correct definitions.

1. water bonding to water: This specific property where water molecules stick to each other is called cohesion. (Match: U)
2. a compound having an uneven surface charge / both charges: Molecules with positive and negative ends are called polar. (Match: A)
3. smallest complete unit of matter: The basic building block of an element is an atom. (Match: O)
4. anything that has mass and takes up space: This is the scientific definition of matter. (Match: V)
5. amount of matter: The measure of how much matter is in an object is its mass. (Match: F)
6. subatomic particle with no charge: The particle inside the nucleus with a neutral charge is the neutron. (Match: C)
7. number of protons: The count of protons determines the atomic number. (Match: Q)
8. subatomic particle that identifies an element: The identity of an element is defined by its proton count. (Match: H)
9. water bonding to something different: When water sticks to other surfaces, it is called adhesion. (Match: W)
10. "pure" / cant be broken down chemically: A substance that cannot be simplified further is an element. (Match: G)
11. atom with equal # of protons and electrons: When charges balance out, the atom is neutral. (Match: M)
12. atom satisfying the octet rule (8e- in outer shell): An atom with a full outer shell is considered stable. (Match: I)
13. an atom with an electrical charge: An atom that has gained or lost electrons becomes an ion. (Match: L)
14. same element different number of neutrons: Variations of an element based on neutron count are isotopes. (Match: Z)
15. electrostatic bond holding molecule to molecule: Forces acting *between* molecules are intermolecular bonds. (Match: S)
16. "opposites attract": This principle describes electrostatic attraction. (Match: B)
17. strongest bond type: Bonds that hold atoms together *inside* a molecule (intramolecular) are generally stronger than those between molecules. So, intramolecular. (Match: T)
18. weakest bond type: Compared to covalent or ionic bonds, hydrogen bonds are weaker. (Match: N)
19. any pH above 7: A pH higher than 7 indicates a base. (Match: P)
20. outer shell electrons: These are known as valence electrons. (Match: J)
21. a base has more \_\_\_\_\_ ions: Bases release hydroxide ions, which carry a negative charge. (Match: X)
22. an acid has more \_\_\_\_\_ ions: Acids release hydrogen ions ($H^+$), which carry a positive charge. (Match: E)
23. bonds (covalent-ionic) hold molecule together: These internal bonds are intramolecular. *Note: Since "Intramolecular" was used for #17 (Strongest bond), and "Ionic" is a specific type of strong bond often contrasted with Hydrogen (weakest), let's swap 17 and 23 for better logical fit.*
* *Correction*: Let's look at #17 again. "Strongest bond type". Ionic and Covalent are strong. #23 says "bonds... hold molecule together". This is definitely Intramolecular. If we assign D (ionic) to #17 as a representative "strong bond" compared to Hydrogen (#18), then #23 is T (intramolecular).
* *Alternative Logic*: Usually, these worksheets pair "Strongest" with Ionic/Covalent and "Weakest" with Hydrogen. Let's assign D (ionic) to #17. Then #23 is T (intramolecular).
24. two or more elements chemically bonded together: This forms a compound. (Match: K)
25. wont allow large or quick pH change: A substance that stabilizes pH is a buffer. (Match: R)
26. protons and neutrons within the nucleus: These particles make up the atomic mass. (Match: Y)

*Self-Correction on 17 and 23*:
Let's re-evaluate #17 and #23.
#17: Strongest bond type. Options left: D (ionic).
#23: Bonds hold molecule together. Options left: T (intramolecular).
This fits perfectly. Ionic bonds are very strong (stronger than hydrogen). Intramolecular is the category for bonds holding a molecule together.

Final Answer:
1. U
2. A
3. O
4. V
5. F
6. C
7. Q
8. H
9. W
10. G
11. M
12. I
13. L
14. Z
15. S
16. B
17. D
18. N
19. P
20. J
21. X
22. E
23. T
24. K
25. R
26. Y