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
Nana76 [90]
3 years ago
6

What is the number of neutrons in an atom with atomic mass of 35, three energy levels, and 7 valence electrons?

Chemistry
2 answers:
soldier1979 [14.2K]3 years ago
5 0

Answer: the number of Neutron = 18

Explanation:

Mass number =35

3 energy levels means 3 shells

1st shell = 2 electrons

2nd shell = 8 electrons

3rd shell = 7 electrons

Total = 17

Proton = 17

Neutron = Mass number — proton

Neutron = 35 — 17 = 18

zubka84 [21]3 years ago
4 0

Answer:

The answer to your question is 18 neutrons

Explanation:

Data

Number of neutrons = ?

Atomic mass = 35

Three energy levels

seven valence electrons

Process

1.- We know that this element is on the third period (3 energy levels)

2.- We also know that this element is located on group 7A (it is a halogen)

3.- From the previous information, we conclude that this element is Chlorine.

4.- Chlorine has an atomic number of 17.

5.- The number of Neutrons = Atomic mass  - atomic number

                                               = 35 - 17

                                              = 18

   

You might be interested in
Number of molecules in 4HCl​
katrin2010 [14]

Answer:

its not cear to answer this question

6 0
3 years ago
What happens to the density of a substance when it is heated? Explain your answer.
hoa [83]

Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.

From: www.middleschoolchemistry.com

7 0
3 years ago
When rolling a die, find the probability of rolling an even number or rolling a
frozen [14]
<h3><em><u>ᎪꪀsωꫀᏒ</u></em></h3>

even no = 3/6 = 1/2

no. less than 5 = 4/6 = 2/3

3 0
2 years ago
Ca(OH)2 + 2 H2SO4 → CaSO4 + 2 H2O
Pie

Answer:

hope this helped

Calcium Hydroxide + Sulfuric Acid = Calcium Sulfate + Water

Explanation:

6 0
2 years ago
Read 2 more answers
The reaction of iron with oxygen to form iron oxide is an example of an oxidation–reduction reaction: 4fe + 3o2 → 2fe2o3. in thi
nadya68 [22]

Answer:-

Oxygen gains electrons and is reduced.

Explanation:-

For this reaction the balanced chemical equation is

4Fe + 3O2 --> 2Fe2O3

When Oxygen is present as oxygen gas, the oxidation number of O is Zero since it is the only element present in Oxygen gas.

Similarly Iron is present in Fe with oxidation number Zero.

In the case of Fe2O3, Oxygen has the oxidation number -2 while Iron has +3.

So the oxidation number of Oxygen goes from Zero to -2.

Since the oxidation number decreases Oxygen is reduced.

Since reduction involves gain of electrons, Oxygen gains electrons.

4 0
3 years ago
Other questions:
  • Given the following balanced reaction between nitrogen gas and oxygen gas to produce nitrous oxide gas, how many moles of nitrou
    11·1 answer
  • Why is Oxygen classified as an element?
    6·2 answers
  • Is francium cation or anion?
    11·1 answer
  • What is the total anion concentration (in meq/l) of a solution that contains 6.0 meq/lna+ , 11.0 meq/lca2+ , and 3.0 meq/lli+ ?
    15·2 answers
  • One molecule of the oxide of element Z reacts with six molecules of water to
    8·1 answer
  • Is vinegar an element, compound or mixture?
    13·1 answer
  • Help science!! *10 points*
    8·1 answer
  • What's the name of a wave moving along a line?
    6·2 answers
  • The chemical formula for water is H2O2. True or False
    7·2 answers
  • Which of these options is the odd one out?<br>Molecule <br>Atom<br>Compound<br>Mixture​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!