Question 1

Which region of the electromagnetic spectrum has the highest energy per photon?

Accepted Answer

Gamma rays

Question 2

A photon of green light has a wavelength of 520 nm. What is its frequency? Use $$c = 3.00 	imes 10^8$ m/s.

Accepted Answer

$$5.77 	imes 10$$^{14}$$ Hz

Question 3

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 4

What is the minimum value of $$n$$ for an $$f$$ orbital to exist?

Accepted Answer

$$n = 3$$

Question 5

Which of the following electron configurations is correct for a neutral copper atom (Cu)?

Accepted Answer

$$[Ar] 4s^1$ 3d$$^{10}$$

Question 6

Which element is the most electronegative?

Accepted Answer

Fluorine

Question 7

Which of the following ions is larger in size: $$Na^+ or$$ $$F^-$$?

Accepted Answer

$$F^-$$

Question 8

What is the molecular geometry of $$NH_3$$ according to VSEPR theory?

Accepted Answer

Trigonal pyramidal

Question 9

Which type of bond is the strongest and shortest?

Accepted Answer

Triple bond

Question 10

What is the hybridization of the central atom in $$CH_4$$?

Accepted Answer

$$sp^3$$

Question 11

A molecule has 4 electron domains and 2 lone pairs on the central atom. What is its molecular geometry?

Accepted Answer

Bent

Question 12

Which of the following best describes a polar covalent bond?

Accepted Answer

Electrons are shared unequally between two atoms

Question 13

What is the formal charge on nitrogen in $$NH_4$$^+$$?

Accepted Answer

+1

Question 14

Which of the following molecules violates the octet rule by having an expanded octet?

Accepted Answer

$$SF_6$$

Question 15

Which quantum number describes the orientation of an orbital in space?

Accepted Answer

Magnetic quantum number ($$m_l)$$

Question 16

Which of the following best explains why ionization energy increases across a period?

Accepted Answer

Nuclear charge increases, pulling electrons closer

Question 17

A microwave oven emits radiation at a frequency of $$2.45 	imes 10^9$ Hz. What is the energy of a single photon? (h = 6.626$$ 	imes $$10^{-34} J$$·s)

Accepted Answer

$$1.62 	imes 10$$^{-24}$$ J

Question 18

Which of the following is the correct noble gas electron configuration for sulfur (S)?

Accepted Answer

$$[Ne] 3s^2$ 3p^4$

Question 19

Which of the following statements about sigma ($$\sigma) $$and pi ($$\pi) $$bonds is correct?

Accepted Answer

A triple bond consists of one sigma and two pi bonds

Question 20

Which of the following molecules has a tetrahedral electron geometry but a bent molecular geometry?

Accepted Answer

$$H_2O$$

General Chemistry Exam 4 Review: EM Waves, Quantum Numbers, Electron Configurations, and Chemical Bonding

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