Q: Calculate the energy of a photon of green light with a wavelength of 503 nm. (Use $$h = 6.63 \times 10$$^{-34}$$ J·s and c = 3.00$$ \times $$10^8 m/s)$$

$$E = 3.95 \times 10$$^{-19}$$\ \text{J}$$

Question 1

Which of the following statements best describes the relationship between wavelength ($$\lambda$$), frequency ($$
u$$), and the speed of light ($$c) $$for electromagnetic radiation?

Accepted Answer

$$c = 
u \lambda$$

Question 2

Calculate the energy of a photon of green light with a wavelength of 503 nm. (Use $$h = 6.63 	imes 10$$^{-34}$$ J·s and c = 3.00$$ 	imes $$10^8 m/s)$$

Accepted Answer

$$E = 3.95 	imes 10$$^{-19}$$\ 	ext{J}$$

Question 3

Which set of quantum numbers is NOT permissible for an electron in an atom?

Accepted Answer

$$n = 1,\ l = 1,\ m_l = 0,\ m_s = +1/2$$

Question 4

Which element has the greatest atomic radius among Al, C, and Si?

Accepted Answer

Al

Question 5

What is the electron configuration for the ground state of sulfur (S)?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$\ $$3p^4$$

Question 6

Which of the following oxides is amphoteric?

Accepted Answer

Al$$_2O$_3$$

Question 7

How many unpaired electrons are present in a phosphorus (P) atom in its ground state?

Accepted Answer

3

Question 8

Which of the following elements has the highest first ionization energy: Ar, Se, or S?

Accepted Answer

Ar

Question 9

Which of the following electron configurations violates the Pauli exclusion principle?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^7$$

Question 10

Which of the following substances is paramagnetic?

Accepted Answer

Oxygen (O$$_2)$$

Question 11

What is the maximum number of electrons that can occupy the 4f subshell?

Accepted Answer

14

Question 12

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 13

Which of the following transitions in the hydrogen atom would emit the highest energy photon?

Accepted Answer

$$n=3 \rightarrow n=1$$

Question 14

Which element has the greatest (most negative) electron affinity: As or Br?

Accepted Answer

Br

Question 15

What is the noble gas configuration for sodium (Na)? Is it paramagnetic or diamagnetic?

Accepted Answer

[Ne] $$3s^1$$, paramagnetic

Question 16

Which rule states that electrons fill degenerate orbitals singly first, with parallel spins?

Accepted Answer

Hund's Rule

Question 17

If an atomic orbital has $$n = 4$$, what are the possible values for $$l$$?

Accepted Answer

$$l = 0, 1, 2, 3$$

Question 18

Which of the following best describes the periodic trend for atomic radius across a period from left to right?

Accepted Answer

Atomic radius decreases

Question 19

Which of the following is a basic oxide?

Accepted Answer

Na$$_2O$$

Question 20

How many different orbitals are in the 3d subshell?

Accepted Answer

5

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