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tatyana61 [14]
2 years ago
15

If an atom has 5 protons, 7 neutrons and 5 electrons what is the mass number of the atom?

Mathematics
1 answer:
Mariana [72]2 years ago
5 0

Answer:

7+5=12

Step-by-step explanation:

To calculate the mass number of an atom, you have to add the protons and the neutrons. We have 7 neutrons and 5 protons, so your mass number would be 12. Let me know if you have any further questions. :)

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Cual es el resultado de truncar a milésimos (3 decimales) 2/7 cuando lo convertimos a número decimal
Whitepunk [10]

The value of 2/7 expressed as a truncated decimal to the nearest thousandth is 0.286

Rational numbers are numbers written as the ratio of two integers. For example, the fraction 2/7 given is a rational number.

Expressing 2/7 as a decimal number will give;

2/7 = 0.2857142... (It gave repeated decimal values)

Truncating the repeating decimal to the nearest thousandth means writing the decimal to 3 decimal places

0.2857142 = 0.286 (to the nearest thousandth)

Hence the value of 2/7 expressed as a truncated decimal to the nearest thousandth is 0.286

Learn more here: brainly.com/question/24643812

4 0
3 years ago
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What is 95,438 - 62,804 rounded to the nearest 10 thousand
den301095 [7]
95,438 - 62,804= 30,000 when rounded
3 0
4 years ago
A square concert stage in the center of a fairground has an area of 4x^2 + 12x +9 ft^2. The dimensions of the stage have the for
mezya [45]

Answer:

(8x+12) feet.The perimeter when x=2ft is 28 feet.

Step-by-step explanation:

The solution is in the attached file.

7 0
3 years ago
Through: (-2, -1), slope = -1
oksano4ka [1.4K]

y= -1x -3

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7 0
3 years ago
A shortage of gold causes the price of gold wire to increase by 140%. If 10 feet of gold wire previously cost $50, what is the n
Marianna [84]
The increase in price is 140% of the original price.
The original price was 100% of the original price since 100% is a whole quantity.
Now the new price is 140% more than it was, so the new price is
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100% + 140% = 240%

Now we find 240% of $50.
To find a percent of a number, multiply the percent by the number.

240% of $50 =
= 240% * $50
= 2.4 * $50
= $120

Answer: 10 ft of gold wire now costs $120
Gold wire now costs $12 per foot.
8 0
3 years ago
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