1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Whitepunk [10]
3 years ago
7

What are the number if protons, neutrons, and electrons

Chemistry
1 answer:
marishachu [46]3 years ago
5 0

protons and electrons are both always the atomic number which is 9 in this case.

For neutrons you subtract the atomic number (9) from the weight of the atom (18.998) some teachers will want you to round to the nearest whole (19). We do this because the number of protons is the atomic number so if you subtract the protons from the whole weight of the atom you would have the electrons and neutrons left. Since electrons weigh so little we don't have to subtract them. Weighing neutrons and electrons would be like weighing an elephant (neutrons) and then putting one marshmallow on the scale (electron).  

You might be interested in
Based on the article "Will the real atomic model please stand up?,” describe what Dalton’s theory states about a molecule of wat
Ira Lisetskai [31]

Answer:

water is made of 2 hydrogen atoms bonded by 1 oxygen atom

Explanation:

5 0
3 years ago
Read 2 more answers
M/ABCI<br>m.CADC = 112<br>BK D 117​
raketka [301]

Answer:

what do u mean????? i dont get the question

4 0
3 years ago
Did I do this science worksheet correctly? Asking for a friend
grin007 [14]

Yes everything looks good to me

8 0
3 years ago
Carry out the following operations as if they were calculations of experimental results and express each answer in standard nota
Shalnov [3]

Answer:

1. 10.6\; \rm m (one decimal place.)

2.0.79\; \rm g (two decimal places.)

3. 16.5\;\rm cm^2 (three significant figures.)

Explanation:

<h3>1.</h3>

The first and second expressions are additions and subtractions. When adding two numbers, the accuracy of the result is given by the number of decimal places in it. The result should have as many decimal places as the input with the least number of decimal places.

For example, in the first expression:

  • 5.6792\;\rm m has four decimal places.
  • 0.6\; \rm m has only one decimal place.
  • 4.33\; \rm m has two decimal places.

Therefore, the result should be rounded to one decimal place. Note that these units are compatible for addition, since they are all the same. The result should have the same unit (that is: \rm m.)

Therefore:

\rm 5.6792\; m + 0.6\; m + 4.33\; m \approx 10.6\; \rm m. (Rounded to one decimal place.)

<h3>2.</h3>

Similarly:

  • \rm 3.70\; \rm g has two decimal places.
  • 2.9133\; \rm g has four decimal places.

Therefore, the result should be rounded to two decimal places. Its unit should be \rm g (same as the unit of the two inputs.)

\rm 3.70\; g - 2.9133\; g \approx 0.79\; \rm g. (Rounded to two decimal places.)

<h3>3.</h3>

When multiplying two numbers, the accuracy of the result should be based on the number of significant figures in it. The result should have as many significant figures as the input with the least number of significant figures. In this expression:

  • 4.51\; \rm cm has three significant figures.
  • 3.6666\; \rm cm has five significant figures.

Therefore, the result should have only three significant figures.

The unit of the result is supposed to be the product of the units of the input. In this expression, that unit will be \rm cm \cdot cm, which is occasionally written as \rm cm^2.

\rm 4.51 \; cm \times 3.6666 \; cm \approx 16.5\; \rm cm^2. (Rounded to three significant figures.)

7 0
3 years ago
Identify the independent and dependent variables. Peter is conducting an experiment to see how much salt will dissolve in water
Vlad1618 [11]
Temperature is independent and the amount of salt dissolving in water is dependant. This is because the amount of salt dissolving depends on how low or high the water temperature is
6 0
3 years ago
Other questions:
  • Aspartame (c14h18n2o5) is a solid used as an artificial sweetener. its combustion produces carbon dioxide gas, liquid water, and
    7·1 answer
  • The most prominent topographical feature of the ocean discovered in the 1960's was _____.
    15·2 answers
  • To achieve an octet, the phosphorus atom forms an ion. The name of this ion is: phosphoride ion phosphic ion phosphorous ion pho
    5·1 answer
  • Need help on number 12
    5·1 answer
  • Identify the number and kinds of atoms present in a molecule of each compound butane
    8·1 answer
  • Temperature is inversely related to the average kinetic energy of a gas.
    15·1 answer
  • What is the mass of 6.2 mil of K2CO3
    7·1 answer
  • A scientist wants to perform a controlled experiment to test the effect of rust on chemically treated iron. which action would b
    10·2 answers
  • Which of the following describes scientists?
    12·1 answer
  • 2 True or False. The speed of light is sped up by dense media.​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!