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
SIZIF [17.4K]
2 years ago
12

An atom has a mass number of 31 and an atomic number of 15. How many protons and how many neutrons are in this atom? Show the nu

clear symbol for this atom.

Chemistry
1 answer:
vaieri [72.5K]2 years ago
5 0
The atomic number of an atom is equal to the amount of protons the atom has, and the mass number is equal to the sum of the protons and neutrons. Therefore:

let protons = p
let neutrons = n                                                  
let atomic mass = a

P+N=A 
15+n=31
n=16

There are 16 neutrons in this atom.
(See attached for nuclear symbol)

You might be interested in
How many molecules of O2 are required to react with 3.00 moles P4?<br> P4+5O2⟶2P2O5
likoan [24]

Answer:

1400

Explanation:

8 0
3 years ago
Read 2 more answers
Purple Group Header Warm-Up Why can I smell a chocolate bar even though it is a solid? Read the description of the office myster
likoan [24]

Answer:

The smell of a chocolate is from the presence of volatile compounds present in the chocolate bar which at room temperature readily changes phase from solid to liquid to vapor or gas

Explanation:

There are nearly 600 identified compounds present in a chocolate bar and out of these, there are volatile components which gives the chocolate bar its distinctive aroma.

These volatile chocolate contents readily change phase from solid to vapor, with very short duration liquid phase.

For example, 3 methylbutanal, vanillin, and several organic compounds which are known to be readily volatile.

4 0
3 years ago
A fossilized animal that was killed by a volcanic eruption has 6.25 percent of its original amount of carbon-14 remaining; this
Art [367]
<span>22 million years ago</span>
7 0
3 years ago
Read 2 more answers
Explain why energy has to be supplied to turn a liquid into a gas
jeka94

Answer:

heat energy are absorbed by water molecules and it is used to change the molecules from liquid to gas? if thats what your asking.

Explanation:

7 0
2 years ago
Help with this question
boyakko [2]
True. Our earth Is getting hotter due to global warming.
6 0
2 years ago
Other questions:
  • Lisa is using a spring scale to measure the weight of a wooden block. She weighs the wooden block a total of five times with the
    14·1 answer
  • Creating a prototype and troubleshooting o
    11·2 answers
  • Solid aluminum hydroxide is added to a solution of potassium phosphite.
    8·1 answer
  • Identify the functional group(s) that appear in betaxolol. This compound is in a class of drugs called beta-blockers, which are
    9·1 answer
  • A "half-reaction” is one which may:
    14·1 answer
  • Question 4 of 10
    8·1 answer
  • Calculate the value of the equilibrium constant for the following system, where the concentrations of reactants and products are
    6·1 answer
  • Calculate the number of different atoms in 0.2 mol ethene​
    8·1 answer
  • What types of radiation cause the parent isotope to change into a different element?
    12·1 answer
  • The smooth endoplasmic reticulum is associated with the production of <br> ___
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!