Question

1) Choose true (T) or false (F) to the following statements:

        a) Light is a shower of protons

        b) Light is a type of energy embodied in electric and magnetic fields

        c) The speed of light in vacuum is 3.00 x 10⁸ m/s

        d) The speed of light in vacuum is 3.00 x 10⁸ km/s

2) Choose the correct statement

        a) We can characterize a wave only by its amplitude

        b) Electric and magnetic fields are the same concept

        c) Light is the clash of neutrons among atoms

        d) Electrons have a dual behavior, as waves and particles

3) The wavelength of light determines its color. From the visible light segment of the spectrum, determine which wavelength is related to green color (the most approximate value)

        a) 530 nm

        b) 645 nm

        c) 330 nm

        d) 275 nm

4) Choose the correct statements (there are two)

        a) The lower the frequency of light, the higher its energy

        b) The frequency is directly proportional to the wavelength

        c) The energy of ultraviolet light is higher than microwaves

        d) The wavelength value of 250 nm belongs to ultraviolet light

5) Write “true” (T) or “false” (F) to the following statements:

        a) 5 kHz represent 5 waves cycles per second

        b) The speed of a wave is directly proportional to its wavelength

        c) The frequency of 100 MHz belong to radio waves

        d) Wavelengths of 10^-15 belong to X-rays

6) The energy of a photon at a wavelength of 4 x 10^-7 m is

        a) 4.969 x 10^-19 J

        b) 1.32 x 10^-19 J

        c) 2.552 x 10^-20 J

        d) 3.35 x 10^-19 J

7) Order the following waves from smaller to higher energy: visible light, microwave, X-rays, ultraviolet light

        a) Microwave<visible light<ultraviolet light<X-rays

        b) Microwave<visible light<X-rays<ultraviolet light

        c) Ultravilet light<X-rays<Visible light<microwave

        d) X-rays<ultraviolet light<visible light<microwave

8) Given an atom with principal quantum number = 4, choose the option with the maximum possible angular momentum quantum numbers (I) and magnetic quantum numbers (m_I):

        a) I=6, m_I = 8

        b) I= 3, m_I = 8

        c) I=3, m_I = 7

        d) I=4, m_I = 9

9) The following statement “no two electrons in an atom can have the same four quantum numbers” corresponds to

        a) Electrons principle

        b) Orbitals principle

        c) Pauli’s exclusion principle

        d) Indeterminacy principle

10) Choose which is the correct option for Plank’s constant (with the correct units)

        a) 1.8x10^-19 C.s

        b) 1.8x10^-19 C.s^-1

        c) 6.626x10^-34 J.s^-1

        d) 6.626x10^-34 J.s

11) The azimuthal quantum number determines

        a) The shape of the orbitals

        b) The energy of the orbitals

        c) The orientation of the orbitals

        d) The electronic spin in the orbitals

12) Choose the correct statements (there are two correct statements):

        a) The modern periodic table was created in 1725

        b) The periodic table gives insights about the periodicity of the elements

        c) The quantum theory helps explaining many chemical behaviors in reactions

        d) The Lewis method of representing chemical bonds is an outdated technique