Answer:
.
Explanation:
Electron orbitals in an atom (e.g., 
) are denoted with:
- A number, denoting the shell (principal energy level) of this orbital, and
- A letter, denoting the shape of this orbital (
, 
, 
, etc.)
There are two aspects to consider when finding the electron configuration of an atom:
- The number of electrons that each type of orbitals could hold, and
- The order in which the orbitals are filled.
The orbital in each shell could hold up to 
electrons (one 
orbital per shell, with up to two electrons.)
The orbitals in each shell could hold up to 
electrons (three 
orbitals per shell, with up to two electrons in each orbital.)
The orbitals in each main shell could hold up to 
electrons (five 
orbitals per shell, with up to two electrons in each orbital.)
Refer to the order in which the orbitals are filled (Aufbau principle.)
- The first orbital to be filled would be (the orbital of the first shell,) accommodating up to
electrons. - The second orbital to be filled would be
(the orbital of the second shell,) accommodating up to electrons.
All four electrons of Beryllium are thus assigned to the and orbitals. In a ground-state Beryllium atom, orbitals 
and beyond would contain no electrons.
Notation:
- Two electrons in the orbital:
(the superscript denotes the number of electrons in this orbital (or group of orbitals).) - Two electrons in the orbital:
.
Write the non-empty orbitals in the order by which they are filled:
.
Answer:
that we should not use harmful chemicals
and not to do pollution
1.Reduce, reuse, and recycle. Cut down on what you throw away.
2.Volunteer. Volunteer for cleanups in your community.
3.Educate.
4.Conserve water.
5.Choose sustainable.
6.Shop wisely.
7.Use long-lasting light bulbs.
8.Plant a tree.
hope this help you ✌
Ionic solids are therefore insulators, which is the right response. Choice "B."
<h3>Explain what an insulator is.</h3>
An insulator is any substance that prevents the energy—such as electricity, heat, or cold—from the moving through it easily. Good insulators include glass, plastic, rubber, and the wood.
<h3>Which insulator is the used most frequently?</h3>
The most popular and generally accessible type of insulation, blanket, comes in the form of rolls or batts. Flexible fibres, most frequently fibreglass, make up this substance. Additionally, natural fibres like cotton and sheep's wool are available in batts and rolls, along with artificial fibers and mineral wool.
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Answer:
In an earthquake, the initial seismic energy wave is called a primary wave. It compresses the material ahead of it; other types of subsequent waves travel in sideways and up-and-down motions. A primary wave travels at different speeds depending on what type of substance it is traveling through. In order to determine how long it will take to travel 2,000 km we have to do the math, using the speed in km/sec and setting up proportions. In a solid such as rock, the primary wave can travel at 5 km/sec; it would take 400 seconds, or about 6.7 minutes to travel 2,000 km. If traveling through water, the wave travels at about 1.45 km/sec and would need 1,379 seconds (23 minutes) to travel 2,000 km. Primary waves traveling through air travel at the speed of sound (.34 km/sec), and would take 5,882 seconds (98 minutes) to travel 2,000 km.
Explanation:
The reactants has 2 NO2 and the product has 3. So we need to make sure we have 6 on each side.
Al + 3Fe(NO2)2 -> Fe + 2Al(NO2)3
This leaves us with us just to balance the Fe And Al
2Al + 3Fe(NO2)2 -> 3Fe + 2Al(NO2)3
Hope this helped :)
