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
Naddika [18.5K]
3 years ago
13

Which of the following could be the subsh

Chemistry
1 answer:
andreev551 [17]3 years ago
6 0

Answer:

2s^2 2p^2

Explanation:

Group 4A contains a total of 4 electrons for each atom in their valence shell. Filling the orbital diagram, let's say, for carbon, notice that when we start with period 2, we have two elements in the s-block, that is, lithium and beryllium. They correspond to the two s electrons that belong to the valence shell of carbon.

Moving on, we have boron and carbon, the remaining 2 electrons. Now, starting with boron, we're in the p-block.

That said, looking at the second period, the electron configuration for the valence shell of a group 4A element would be:

2s^2 2p^2

You might be interested in
The mass of the atom is found by adding is protons and neutrons the electrical charge of an atom is found by adding the charge i
Hitman42 [59]
When you combine protons and neutrons in the electrical charge they combine to make electricity
3 0
3 years ago
How many molecules are there in 79g of Fe2O3? how many atoms is this?
Leya [2.2K]
There are approximately 160 grams in 1 mol of Fe2O3 molecules. Therefore, there would be 79/160= 0.49375 mols of Fe2O3 molecules in 79 grams. There are 5 atoms in total for each molecule of Fe2O3, therefore 79/160 * 5 = 79/32 = 2.46875 mols of atoms.
4 0
3 years ago
Which is and element <br> A) Salad<br> B) Sugar<br> C) Water <br> D) Potassium
Semenov [28]

Answer:

the only element above is potassium

3 0
3 years ago
The air inside a bicycle tire pump has 27 joules of heat conducted away from while 77.9 joules of work done are being done on it
tatyana61 [14]

Answer:

51 J

Explanation:

The air inside a bicycle tire pump has 27 joules of heat conducted away. By convention, when heat is released, it takes the negative sign, so Q = -27 J.

77.9 joules of work done are being done on the air inside a bicycle tire pump. By convention, when work is being done on the system, it takes the positive sign, so W = 77.9 J

We can calculate the change in the internal energy (ΔU) using the following expression.

ΔU = Q + W

ΔU = (-27 J) + 77.9 J

ΔU =  51 J

7 0
3 years ago
Make the following conversion. 120 mL = _____ cm³ <br><br> 12.0<br> 1200<br> 120<br> 1.20
Lina20 [59]
The correct answer would be 120.
4 0
3 years ago
Read 2 more answers
Other questions:
  • What would the volume (L) of 6.6 g of CO2 be if it were measured at the same temperature and pressure as that of the experiment
    11·1 answer
  • Which statement explains why the bonds between non metals tend to be covalent
    10·1 answer
  • What happens to a person's weight on smaller and larger planets?
    7·1 answer
  • Sodium permanganate and iron(III) chloride are both dissolved in a beaker of water. In a double displacement reaction, two new p
    13·1 answer
  • How can you be sure a solid is pure?
    10·1 answer
  • What is the minimum mass of 25°c water required to melt all 35.1 g of ice?
    15·1 answer
  • You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the rea
    5·1 answer
  • What will be the final temperature when a 25.0 g block of aluminum (initially at 25 °C) absorbs 10.0 kJ of heat? The specific he
    5·1 answer
  • A gas initially has a volume of 300. mL at a pressure of 1.0 atm, what will the
    13·1 answer
  • Please help!!!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!