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: Group Names

GOB Chemistry

2. Atoms and the Periodic Table

Periodic Table: Group Names

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1:24 minutes

Problem 7b

Textbook Question

Identify the group or period number described by each of the following:
b. begins with helium

Verified step by step guidance

Step 1: Recall that the periodic table is organized into groups (vertical columns) and periods (horizontal rows). Groups are numbered from 1 to 18, and periods are numbered from 1 to 7.

Step 2: Identify the element helium (He) on the periodic table. Helium is located in the top right corner of the table.

Step 3: Determine the period number for helium. Periods are horizontal rows, and helium is in the first row, so it belongs to Period 1.

Step 4: Determine the group number for helium. Helium is part of the noble gases, which are located in Group 18 (the last column of the periodic table).

Step 5: Conclude that helium begins Period 1 and is part of Group 18. This information can be used to answer the question about its group or period number.

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Key Concepts

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

Noble Gases

Noble gases are a group of chemical elements in Group 18 of the periodic table, known for their lack of reactivity due to having a full valence shell of electrons. This group includes helium, neon, argon, krypton, xenon, and radon. Helium, the lightest noble gas, is often used in balloons and as a cooling medium in cryogenics.

Periodic Table Groups

The periodic table is organized into columns called groups, which contain elements with similar chemical properties. Each group is numbered from 1 to 18, with Group 1 containing alkali metals and Group 18 containing noble gases. Understanding the group number helps predict the behavior and reactivity of elements.

Element Positioning

The position of an element in the periodic table is determined by its atomic number, which corresponds to the number of protons in its nucleus. Elements are arranged in order of increasing atomic number, and their placement in specific groups and periods reflects their electronic configuration and chemical properties. Helium, for instance, is positioned at the top of Group 18.

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Related Practice

Textbook Question

Complete the following statements:

c. Sodium and potassium are examples of elements called _____.

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Textbook Question

Complete the following statements:

b. The elements in Group 7A (17) are called the _____.

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Multiple Choice

Which of the following is a metalloid that is also a chalcogen?

Locate aluminum in the periodic table and give its group number and period number.

1231

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Textbook Question

Identify the group or period number described by each of the following:

a. contains C, N, and O

1242

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Textbook Question

Using TABLE 4.4, identify the function of each of the following in the body and classify each as an alkali metal, an alkaline earth metal, a transition element, or a halogen:

b. Cu

945

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Textbook Question

Use the following blank periodic table to show where the elements matching the following descriptions appear.

a. Elements with the valence-shell electron configuration ns² np⁵

b. An element whose third shell contains two p electrons

c. Elements with a completely filled valence shell

2113

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Textbook Question

Juan added the following elements to the soil to improve potato production. Identify the group and period for and classify each as an alkali metal, an alkaline earth metal, a transition element, or a nonmetal:

b. Cu

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Identify the group or period number described by each of the following:b. begins with helium

Key Concepts

Noble Gases

Periodic Table Groups

Element Positioning

Watch next

Identify the group or period number described by each of the following:
b. begins with helium