Osmosis and Tonicity Worksheet Answer Key | Exercises Cell Biology ... - Free Printable

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The image contains three sections of questions related to chemistry, specifically focusing on atomic structure (protons, neutrons, electrons), isotopes, and ions.

Here is the breakdown of the solutions for the visible questions:

Part 1: Basic Atomic Structure
1. Question: What is the total mass number for this atom?
* Reasoning: The mass number is the sum of protons and neutrons. Looking at the diagram, it shows a nucleus with 6 protons (+) and 8 neutrons (n). $6 + 8 = 14$.
* Answer: 14

2. Question: What is the atomic number for this atom?
* Reasoning: The atomic number is equal to the number of protons. The diagram shows 6 protons.
* Answer: 6

3. Question: Is it an ion or neutral?
* Reasoning: A neutral atom has equal numbers of protons and electrons. This atom has 6 protons and the electron shell shows 6 electrons. Since $6 = 6$, it is neutral.
* Answer: Neutral

4. Question: How many electrons are there?
* Reasoning: Counting the dots around the nucleus, there are 2 in the inner shell and 4 in the outer shell. Total = 6.
* Answer: 6

5. Question: How many protons are there?
* Reasoning: The nucleus label indicates 6 protons.
* Answer: 6

6. Question: How many neutrons are there?
* Reasoning: The nucleus label indicates 8 neutrons.
* Answer: 8

7. Question: What element is this?
* Reasoning: The element is defined by the atomic number (number of protons). Atomic number 6 corresponds to Carbon on the periodic table.
* Answer: Carbon

Part 2: Another Atom
8. Question: What is the total mass number for this atom?
* Reasoning: The diagram shows 11 protons and 12 neutrons. Mass Number = Protons + Neutrons = $11 + 12 = 23$.
* Answer: 23

9. Question: What is the atomic number for this atom?
* Reasoning: Atomic number = number of protons = 11.
* Answer: 11

10. Question: Is it an ion or neutral?
* Reasoning: It has 11 protons but only 10 electrons (2 in first shell, 8 in second). Since protons ($+$) $\neq$ electrons ($-$), it is an ion. Specifically, it has one more positive charge, making it a cation.
* Answer: Ion

11. Question: How many electrons are there?
* Reasoning: Counting the electrons in the shells: 2 in the inner, 8 in the outer. Total = 10.
* Answer: 10

12. Question: How many protons are there?
* Reasoning: The nucleus label says 11 protons.
* Answer: 11

13. Question: How many neutrons are there?
* Reasoning: The nucleus label says 12 neutrons.
* Answer: 12

14. Question: What element is this?
* Reasoning: Atomic number 11 corresponds to Sodium.
* Answer: Sodium

Part 3: Identifying Isotopes/Ions
15. Question: What is the total mass number for this atom?
* Reasoning: The diagram shows 17 protons and 18 neutrons. Mass Number = $17 + 18 = 35$.
* Answer: 35

16. Question: What is the atomic number for this atom?
* Reasoning: Atomic number = number of protons = 17.
* Answer: 17

17. Question: Is it an ion or neutral?
* Reasoning: It has 17 protons and 18 electrons (2, 8, 8). Since electrons ($-$) > protons ($+$), it is an ion (anion).
* Answer: Ion

18. Question: How many electrons are there?
* Reasoning: Shells have 2, 8, and 8 electrons. Total = 18.
* Answer: 18

19. Question: How many protons are there?
* Reasoning: Nucleus label says 17 protons.
* Answer: 17

20. Question: How many neutrons are there?
* Reasoning: Nucleus label says 18 neutrons.
* Answer: 18

21. Question: What element is this?
* Reasoning: Atomic number 17 corresponds to Chlorine.
* Answer: Chlorine

Final Answer:
Part 1:
1. 14
2. 6
3. Neutral
4. 6
5. 6
6. 8
7. Carbon

Part 2:
8. 23
9. 11
10. Ion
11. 10
12. 11
13. 12
14. Sodium

Part 3:
15. 35
16. 17
17. Ion
18. 18
19. 17
20. 18
21. Chlorine