All categories

2 years ago

Which element rarely reacts because it has 8 electrons in its outer shell?

Chemistry

2 answers:

mojhsa [17]2 years ago

8 0

Answer:

C. Arsenic

Explanation:

Each period is terminated by a noble gas with a closed valence shell with electronic configuration ns²np⁶. Since noble gases have completely filled orbitals in the valence shell and are very stable, it becomes very difficult to alter their stable arrangement by the addition or removal of electrons. They they exhibit very low chemical reactivity $.$

Noble gas elements are: Neon, Argon, Krypton, Xenon, Radon, Helium (2 electrons in outer shell, stable).

timama [110]2 years ago

7 0

Answer:

B. Xenon

Explanation:

A.P.E.X

You might be interested in

_____ The primary function of molecular membranes is the transport of ions and molecules into and out of cells. The movement of

ale4655 [162]

<h2>Active Transport </h2>

Explanation:

A cell uses energy for the movement of substances against a concentration gradient or an electrochemical gradient that maintains a balanced concentration of ions and molecules in living cells.
This transport of substances is known as Active transport mechanisms which are the basic function of the cell membranes.
The energy used is in the form of ATP.
Active transport occurs when there is a difference in the concentration of particles on both sides.

5 0

3 years ago

What is the lowest numbered energy level where a d sublevel is found?

UkoKoshka [18]

Answer : The lowest numbered energy level where a 'd' sublevel is found is 3.

Explanation : According to the theory of order of electron filling;

The 4s orbitals is observed to have a lower energy than the 3d, and so the 4s orbitals are filled first.

It is known that 4s electrons are lost first during ionisation activity. Therefore, the electrons lost first will come from the highest energy level, furthest from the influence of the nucleus.

So, the lowest energy level where 'd' sub shell will be found is 3d.

4 0

2 years ago

Read 2 more answers

For a science project, Janet performs four experiments that are supposed to show a chemical reaction. She displays her results i

g100num [7]

Answer:

Experiment 1

Explanation:

I don’t know if this is right

5 0

3 years ago

Green plants absorb sunlight to power photosynthesis, the chemical synthesis of food from water and carbon dioxide. The compound

Alecsey [184]

Answer:

4.5 × 10^14 Hz

Explanation:

According to this question, chlorophyll pigment strongly absorbs light with a wavelength of 662nm. To calculate the frequency of this light, the following formula is used:

λ = v/f

Where;

λ = wavelength (m)

v = speed of light (3×10^8m/s)

f = frequency of light (Hz)

Since the λ = 662nm = 662 × 10^-9m,

f = v/λ

f = 3 × 10^8/662 × 10^-9

f = 0.004531 × 10^(8+9)

f = 0.0045 × 10^17

f = 4.5 × 10^14 Hz

6 0

3 years ago

Consider two bonds, A and B. Both bonds presently are selling at their par value of $1,000. Each pays interest of $120 annually.

Dima020 [189]

Answer:

The answer is "Option b"

Explanation:

The longer its maturity, therefore higher the rise in prices as the interest rate changes, therefore higher the value from both bonds, but bond B is greater than bond A.

6 0

3 years ago