Chemistry College

Why do you think plant cells need a cell wall as well as a cell membrane?

Answers

Answer 1

Answer:

to protect it from harm

Explanation:

Related Questions

Which of the following is considered a compound?

Ag, silver

H2, hydrogen gas

CO2, carbon dioxide gas

Answers

I would said it is CO2, carbon dioxide gas

which of the following elements has properties different than the rest?

Ac
Co
Cu
Sc

Answers

Answer:

Explanation:

Answer:

The answer is a

Explanation:

based on slater's rule, what is the shielding constant experienced by a valance d- electron in a copper atom

Answers

Answer:

The general principle behind Slater's Rule is that the actual charge felt by an electron is equal to what you'd expect the charge to be from a certain number of protons, but minus a certain amount of charge from other electrons. Slater's rules allow you to estimate the effective nuclear charge Zeff from the real number of protons in the nucleus and the effective shielding of electrons in each orbital "shell" (e.g., to compare the effective nuclear charge and shielding 3d and 4s in transition metals). Slater's rules are fairly simple and produce fairly accurate predictions of things like the electron configurations and ionization energies.

Explanation:

The shielding constant of a d electron in copper is 22.15.

From Slaters's rule;

Zeff = Z - S

Where;

Z = Nuclear charge

S = Shielding constant

Now we are required to find the shielding constant for copper d - electrons;

The shielding contributed by the d electrons = (9 × 0.35) = 3.15

The shielding contributed by other electrons = (19 × 1.00) = 19

Total shielding constant = 3.15 + 19 = 22.15

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