Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Atoms and Molecules
An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.
Question

Determine the number of protons, neutrons, and electrons in the following:   (Also attached in the photo)

25

x

12 

The image features a simple mathematical expression involving multiplication. The expression is written with one number above the other, separated by a multiplication sign "X". Specifically, the numbers and symbol appear as follows: 25 X 12 This suggests that 25 is being multiplied by 12. Understanding this format is essential for basic arithmetic operations, particularly multiplication. This setup is traditionally used to perform long multiplication manually. Here's a step-by-step guide to multiplying these two numbers using long multiplication: 1. Write the numbers in a vertical format with the larger number on top: ``` 25 x 12 ``` 2. Multiply the digit in the ones place of the bottom number (2) by each digit of the top number, starting from the right: ``` 25 x 12 ----- 50 ← (2 * 25) ``` 3. Place a zero below the first line since we're moving to the tens place (1 in 12 is actually 10): ``` 25 x 12 ----- 50 250 ← (1 * 25 moved one place to the left) ``` 4. Add the results of the two multiplications: ``` 25 x 12 ----- 50 250 ----- 300 ``` So, \(25 \times 12 = 300\).
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Transcribed Image Text:The image features a simple mathematical expression involving multiplication. The expression is written with one number above the other, separated by a multiplication sign "X". Specifically, the numbers and symbol appear as follows: 25 X 12 This suggests that 25 is being multiplied by 12. Understanding this format is essential for basic arithmetic operations, particularly multiplication. This setup is traditionally used to perform long multiplication manually. Here's a step-by-step guide to multiplying these two numbers using long multiplication: 1. Write the numbers in a vertical format with the larger number on top: ``` 25 x 12 ``` 2. Multiply the digit in the ones place of the bottom number (2) by each digit of the top number, starting from the right: ``` 25 x 12 ----- 50 ← (2 * 25) ``` 3. Place a zero below the first line since we're moving to the tens place (1 in 12 is actually 10): ``` 25 x 12 ----- 50 250 ← (1 * 25 moved one place to the left) ``` 4. Add the results of the two multiplications: ``` 25 x 12 ----- 50 250 ----- 300 ``` So, \(25 \times 12 = 300\).
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