/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 54 What is the group number and num... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 4: Problem 54

What is the group number and number of valence electrons for each of the following elements? a. potassium b. silicon c. neon d. aluminum e. barium f. bromine

Short Answer

Expert verified
Potassium: Group 1, 1 valence; Silicon: Group 14, 4 valence; Neon: Group 18, 8 valence; Aluminum: Group 13, 3 valence; Barium: Group 2, 2 valence; Bromine: Group 17, 7 valence.

Step by step solution

01

Identify the element's position on the Periodic Table

Find the position of each element on the Periodic Table to determine its group and period. This will help in identifying the number of valence electrons.
02

Potassium (K)

Potassium is located in Group 1 and Period 4. Elements in Group 1 have 1 valence electron.
03

Silicon (Si)

Silicon is located in Group 14 and Period 3. Elements in Group 14 have 4 valence electrons.
04

Neon (Ne)

Neon is located in Group 18 and Period 2. Elements in Group 18 have 8 valence electrons.
05

Aluminum (Al)

Aluminum is located in Group 13 and Period 3. Elements in Group 13 have 3 valence electrons.
06

Barium (Ba)

Barium is located in Group 2 and Period 6. Elements in Group 2 have 2 valence electrons.
07

Bromine (Br)

Bromine is located in Group 17 and Period 4. Elements in Group 17 have 7 valence electrons.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Periodic Table
The Periodic Table is an essential tool in chemistry. It organizes all known elements in a structured manner, making it easier to understand their properties and relationships. Each element is placed in a specific location based on its atomic number (number of protons), which increases from left to right and top to bottom. The table has rows called periods and columns called groups. Elements in the same group often have similar properties because they have the same number of valence electrons.
Using the Periodic Table helps us determine the group number, which tells us the number of valence electrons. For example, all elements in Group 1 have 1 valence electron, while those in Group 17 have 7 valence electrons.
Understanding the layout of the Periodic Table is key for identifying an element's group number and its properties.
electron configuration
Electron configuration is the distribution of electrons in an atom's orbitals. It's represented as a sequence of numbers and letters indicating the energy levels, sublevels, and number of electrons. For instance, the electron configuration for neon (Ne) is 1s虏 2s虏 2p鈦�, indicating that it has electrons in the first and second energy levels.
To figure out the electron configuration, you follow the Aufbau principle, which states that electrons occupy the lowest energy orbitals first. Here's a brief guide:
  • Start with the lowest energy orbital, 1s, and move upwards (1s, 2s, 2p, 3s, etc.).
  • Use the periodic table as a guide. Each period (row) represents the filling of a new electron shell.
  • The group number can help you determine the number of valence electrons.
For example:
  • Potassium (K) has an electron configuration of 1s虏 2s虏 2p鈦� 3s虏 3p鈦� 4s鹿. It has 1 valence electron, making it highly reactive.
  • Silicon (Si) has an electron configuration of 1s虏 2s虏 2p鈦� 3s虏 3p虏. This gives it 4 valence electrons, which makes it essential for building molecules in organic and inorganic chemistry.
Understanding electron configuration helps predict how elements will interact in chemical reactions.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Write the names and symbols of the elements with the following numbers of protons: (4.4) a. 27 b. 32 c. 11 d. 48 e. 62 6\. 73

For the following atoms, determine the number of protons, neutrons, and electrons: (4.4,4.5) a. \({ }_{80}^{202} \mathrm{Hg}\) b. \({ }_{53}^{127} \mathrm{I}\) c. \({ }_{35}^{75} \mathrm{Br}\) e. \({ }_{78}^{195} \mathrm{Pt}\)

What are the number of protons, neutrons and electrons in the following isotopes? a. \({ }_{2}^{4} \mathrm{He}\) b. \({ }_{6}^{14} C\) c. \({ }_{92}^{235} U\) d. \({ }_{17}^{35} C l\)

Identify each of the following elements as a metal, a nonmetal, or a metalloid: a. located in Group \(2 \mathrm{~A}\) ( 2 ) b. a good conductor of electricity c. chlorine d. arsenic e. an element that is not shiny f. oxygen g. nitrogen h. tin

Complete each of the statements a to d using \(1,2,\) or 3: 1\. decreases 2\. increases 3\. remains the same Going down Group \(6 \mathrm{~A}\) (16), a. the ionization energy_________ b. the atomic size_________ c. the metallic character_________ d. the number of valence electrons _________
See all solutions

Recommended explanations on Chemistry Textbooks

Chemical Reactions

Read Explanation

Organic Chemistry

Read Explanation

Chemical Analysis

Read Explanation

The Earths Atmosphere

Read Explanation

Making Measurements

Read Explanation

Physical Chemistry

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.