CH 301 Mid-Unit Quiz

Equation for neutrons (neutral atom)

Mass # - atomic # = neutrons

Which two subatomic particles have the same mass?

Protons and neutrons

Equation for electrons (neutral atom)

Atomic # = electrons

An isotope has…

more or less neutrons

An ion has…

more or less electrons

The visible light spectrum spans what wavelength?

380-750

Which waves cause rotations?

Radio waves and microwaves

Which waves cause vibrations?

Infrared light

Which waves cause electron excitement?

Visible light (valence), UV light (valence), X-Ray (core), Gamma (core and atom decay)

List every SI unit you will use

m, Kg, s, K, A, mol, cd (light intensity), J (the only one that is not a base unit)

List the atoms on the metalloid stair

B, Si, Ge, As, Sb, Te

List the scientists you studied who developed the atom in chronological order.

Dalton (hard sphere), Thompson (plum pudding), Rutherford (oval orbit), Bohr (Distinct energy orbitals), Schrodinger (electron probability)

Match the following: n = 1, IR, n = 3, Visible Light, n = 2, UV

UV and n = 1, Visible Light and n = 2, IR and n = 3

Who studied the emission spectra of hydrogen?

Balmer, he found an inverse squared relationship that described the distinct wavelengths emitted and came up with the constant Rydberg built his equation on

Who discovered electromagnetism?

Maxwell

The larger the gap between the threshold and proton energy…

The higher the ejected electron energy

What three things caused the downfall of classic mechanics because it showed the particle behavior (discontinuity) of electrons?

Blackbody radiation, the photoelectric effect, emission spectra

What is the range of wavelength for radio waves?

10^8 to 10^1 (m)

What is the range of wavelength for microwaves?

10^1 to 10^-2 (m)

What is the range of wavelengths for Infrared light?

10^-2 to 10^-4 (m)

What is the range of wavelengths for visible light?

10^-4 to 10^-5 (m)

What is the range of wavelengths for ultraviolet light?

10^-4 to 10^-8 (m)

What is the range of wavelengths for x-rays?

10^-7 to 10^-12 (m)

What is the range of wavelengths for gamma rays?

10^-12 onwards (m)

Dalton said atoms are…

Indestructible solid spheres

Thompson said atoms are…

Spherical clouds of positive charge with electrons inside (plum pudding)

Rutherford (after his gold foil experiment) said atoms are…

electrons orbiting around a very dense, positively charged core

Bohr said that atoms are…

electrons orbiting in specific energy levels around a dense positive core

Schrodinger said atoms are…

Electrons in a potentiality orbit around a dense positively charged core

Beer-Lambert’s Law

A = (c)(l)(E), absorption equals the path length (l) times the molar absorptivity (E) times the concentration

Who organized the periodic table?

Dimitri Mendeleev

Speed of light

c = 2.998×10^8 m/s

Match the scientist to the effect that destroyed classical mechanics: Planck, Einstein, Balmer, Emission Spectra, Photoelectric Effect, Blackbody Radiation

Planck = Blackbody Radiation, Photoelectric Effect, Einstein = Photoelectric effect, Balmer = emission spectra