Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

2. Atoms and the Periodic Table

Periodic Table: Element Symbols

GOB Chemistry

2. Atoms and the Periodic Table

Periodic Table: Element Symbols

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1:54 minutes

Problem 10a

Textbook Question

Give the symbol of the element described by each of the following:
a. the alkaline earth metal in Period 2

Verified step by step guidance

Step 1: Understand the periodic table structure. The periodic table is organized into periods (horizontal rows) and groups (vertical columns). Period 2 refers to the second row of the periodic table.

Step 2: Recall the definition of alkaline earth metals. Alkaline earth metals are elements in Group 2 of the periodic table. These elements are characterized by having two valence electrons and include beryllium (Be), magnesium (Mg), calcium (Ca), etc.

Step 3: Identify the element in Period 2 that belongs to Group 2. Locate Period 2 on the periodic table and find the element in Group 2 within that row.

Step 4: Write the symbol of the element. The symbol for the element in Period 2 and Group 2 is 'Be', which stands for beryllium.

Step 5: Verify your answer by checking the periodic table to ensure that beryllium is indeed the alkaline earth metal in Period 2.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Alkaline Earth Metals

Alkaline earth metals are a group of elements found in Group 2 of the periodic table. They are characterized by having two electrons in their outermost shell, which makes them highly reactive, though less so than alkali metals. This group includes elements like beryllium, magnesium, calcium, and others, each exhibiting similar chemical properties.

Periodic Table

The periodic table is a systematic arrangement of chemical elements, organized by increasing atomic number and grouped by similar properties. Each element is represented by its chemical symbol, and the table is divided into periods (horizontal rows) and groups (vertical columns). Understanding the layout of the periodic table is essential for identifying elements and predicting their behavior.

Period 2 Elements

Period 2 of the periodic table includes the elements from lithium (Li) to neon (Ne). This period contains a total of eight elements, with increasing atomic numbers and varying properties. The alkaline earth metal in this period is beryllium (Be), which is the second element in Group 2, highlighting its position and characteristics within the broader context of the periodic table.