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
ipn [44]
3 years ago
10

Write the electron configuration for Br- and state the number of valence electrons. Select one:

Chemistry
1 answer:
Aleks04 [339]3 years ago
3 0

Answer:

1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^62} 4s^{2} 3d^{10} 4p^{5} with 7 valence electrons.

Explanation:

Bromine has 7 unpaired (valence) electrons in its outer shell, and a total of 35 elecrons. Its <em>4s</em> orbital is completely filled with 2 electrons.

The closest answer from the options would be option D.

I hope this helps.

You might be interested in
What are the basic building blocks of proteins?
Anna11 [10]

Answer:

Amino Acids

Explanation:

What Are Proteins Made Of? The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component called a side chain.

8 0
3 years ago
Water vapor in the morning turns into dew on the grass.
Valentin [98]

Answer:

is that a question or statement?

Explanation:

7 0
3 years ago
Calculate difference, ΔH-ΔE=Δ(PV) for the combustion reaction of 1 mole of heptane. (Assume standard state conditions and 298 K
Mamont248 [21]

Answer:

ΔPV = -9911 J

Explanation:

The combustion of 1 mole of heptane is:

C₇H₁₆(l) + 11O₂(g) → 7CO₂(g) + 8H₂O(l)

The change in number of moles of gas molecules is:

Δn = 7 moles products - 11 moles reactants = -<em>4 moles</em>

Using ideal gas ΔPV is:

ΔPV = ΔnRT

Where:

Δn is -4mol

R is 8,314472 J/molK

T is 298K

Replacing:

<em>ΔPV = -9911 J</em>

<em />

I hope it helps!

6 0
4 years ago
PLEASE HELP!!!!
bija089 [108]

Answer:

Molar mass = 18.12 g/0.777 moles = 23.3 g/mole

i hope this helps

Explanation:

4 0
3 years ago
Read 2 more answers
HOW separate water mixture + mothballs?
White raven [17]
You would need to evaporate it
 
5 0
4 years ago
Other questions:
  • Como se ordena la palabra ecrfinaine
    13·1 answer
  • Problem Page A gas made up of atoms escapes through a pinhole 0.225 times as fast as H2 gas. Write the chemical formula of the g
    10·2 answers
  • What happens as a result of the kinetic energy of the particles in a liquid being comparable with the intermolecular attractions
    15·2 answers
  • Group 7A (17) elements can gain one electron to attain a noble gas electron configuration. In combination with metal atoms that
    11·1 answer
  • During an experiment, 104 grams of calcium carbonate reacted with an excess amount of hydrochloric acid. If the percent yield of
    11·1 answer
  • State the method you will use to separate the following substances. (a) calcium carbonate from table salt (b) iodine from sodium
    11·2 answers
  • Which of the following describes an ionic bond?
    15·1 answer
  • What is the maximum mass, in kilograms, of (NH4)2U2O7 that can be formed from the reaction of 100 kg of water and 100 kg of ammo
    7·1 answer
  • QUESTION 1 (POLL)
    15·1 answer
  • What does the electron configuration for the noble gases tell us about the elements in the<br> group
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!