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 Trend: Atomic Radius (Simplified)

GOB Chemistry

2. Atoms and the Periodic Table

Periodic Trend: Atomic Radius (Simplified)

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Multiple Choice

Which alkaline earth metal has the largest atomic radius?

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First, identify the group of elements known as alkaline earth metals. These are located in Group 2 of the periodic table and include: Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra).

Next, understand that atomic radius generally increases as you move down a group in the periodic table. This is because each successive element has an additional electron shell, making the atom larger.

Now, compare the atomic radii of the alkaline earth metals. Since Barium (Ba) is lower in the group than Magnesium (Mg), it will have a larger atomic radius.

Consider the elements listed in the problem: Na, Ba, Cl, Mg, Li. Identify which of these are alkaline earth metals. Only Mg and Ba are alkaline earth metals.

Finally, determine which of the alkaline earth metals listed has the largest atomic radius. Since Ba is lower in the group than Mg, Ba has the largest atomic radius among the options provided.