Electrons and Energy Review | Baamboozle - Baamboozle

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Describe what caused the colored flames in the flame test lab.

electrons absorbed energy from the flame; jumped to higher less stable energy level; released energy as they fell back to ground state

How many valence electrons does every element in group/family 2 of the periodic table have?

2

What is the symbol for frequency?

v

What is the unit for energy?

Joules (J)

What is the unit for wavelength?

m

What is Planck's constant?

h = 6.626 x 10^-34 Jxs

What is the speed of light?

c = 3.00 x 10^8 m/s/s

What is the maximum number of electrons that can occupy energy level 2?

8

How many valence electrons does every element in group/family 14 of the periodic table have?

4

What are valence electrons?

electrons in the highest (outer most) energy level

In electromagnetic wave calculations, what is "c"?

speed of light= 3.00x10^8 m/s/s

The atomic emission spectra uses which part of the Electromagnetic (EM) spectrum?

visible light

True or False: Elements in the same period have similar chemical properties?

False

What is the symbol for wavelength?

λ (lambda)

What is the maximum number of electrons that can occupy energy level 3?

8

How does an electron become "excited"?

The electron absorbs energy and jumps to a higher energy level.

Electromagnetic waves with greater energy have (larger or smaller) wavelengths?

smaller

What element is in the 3rd period and has 2 valence electrons?

Magnesium (Mg)

What is the frequency of a wave whose wavelength is 5.25x10^-7 m? (include proper units in your answer)

c=λv -->v=c/λ=(3.00x10^8)/(5.25x10^-7)= 5.71x10^14 Hz

How can you use the periodic table to determine the number of energy levels an atom has?

look at the period (horizontal row) the element is in

What is the maximum number of electrons that can occupy energy level 5?

18

True or False: Electrons move in circular paths around the nucleus of the atom.

False

How many valence electrons does every element in group/family 17 of the periodic table have?

7

What is the maximum number of electrons that can occupy energy level 1?

2

What is the maximum number of electrons that can occupy energy level 6?

32

Visible light has a wavelength between _________ - __________ (approximately).

400 nm to 750 nm (4.00x10^-7 m to 7.50x10^-7 m)

Why can atomic emission spectra be used to identify unknown samples?

because the wavelengths emitted from each element are unique to that element (the color flame is unique to the element)

What is the energy of a photon whose frequency is 3.9x10^14 Hz? (include proper units in your answer)

E=hv=(6.626x10^-34)(3.9x10^14)= 2.58x10^-19 J

What is the unit for frequency?

Hertz (Hz or 1/s or s^-1)

Why does each element have a different atomic emission spectra?

each element has a unique arrangement of electrons

What color of visible light has the smallest amount of energy? the greatest amount of energy?

smallest: red; largest: purple/pink

What is the symbol for energy?

E

In electromagnetic wave calculations, what is "h"?

Planck's constant= 6.626 x 10^-34 Jxs

What formula would you use to solve the following problem?: Calculate the energy of an EM wave with a frequency of 5.00x10^14 Hz.

E=hv

True or False: Elements in the same group/family have similar chemical properties?

True

What formula would you use to solve the following problem?: Calculate the wavelength of an EM wave with a frequency of 5.00x10^14 Hz.

c=λv