Chem. 5 Mastering

Of infrared light, visible radiation, and X-ray, which has the shortest wavelengths?

X-ray infrared light visible radiation

The abbreviated electron configuration for the iron atom is ________.

[Ar]4s 23d 6

The abbreviated electron configuration for a boron atom (Atomic number = 5) is ________.

[He]2s22p1

The abbreviated electron configuration for the sulfur atom is ________.

[Ne]3s23p4

Electrons can jump to higher energy levels when they _____ (absorb/emit) a photon.

absorb

Why is the ionization energy of Ca lower than that of Mg?

because inner shell electrons in Ca are farther from the nucleus than in Mg

Identify the photon in each pair with the greater energy. blue light or orange light? red light blue light?

both are blue light

How are the wavelength (λ ) and frequency (ν ) of light related? Note that c is the speed of light.

c= λ × ν

The atomic radius of potassium is smaller than the atomic radius of ________.

cesium

Iron is a ________ block element.

d

Electrons drop to lower energy levels when they ___________ (absorb/emit) a photon.

emit

Lithium is a d block element. true or false

false

When an electron drops to a lower energy level, it gains energy.

false

The number of electromagnetic waves that travel past a certain point in a given time is the ________ of the radiation.

frequency

Atomic emission spectra are due to electrons...

in an atom dropping from one energy level to a lower one.

Valence electrons are electrons located

in the outermost energy level of an atom.

Which has a lower energy? infrared radiation or ultraviolet radiation

infrared radiation

Sulfur is a ________ block element.

p

Part A 2s and 3s orbitals Check all that apply. Part B 4s and 4p sublevels Check all that apply. Part C 2p and 4p sublevels Check all that apply. Part D three 4p orbitals Check all that apply.

part A-They have the same shape and The maximum number of electrons is the same. part B-They are in the same energy level. part C-The maximum number of electrons is the same. and They have the same shape. part D-The maximum number of electrons is the same. They are in the same energy level. They have the same shape.

Part A How many 4d electrons are in Cd ? Express your answer as an integer. Part B How many 5p electrons are in In ? Express your answer as an integer. Part C How many 3p electrons are in S ? Express your answer as an integer. Part D How many 5s electrons are in Sr? Express your answer as an integer.

part a-10 part b-1 part c-4 part d-2

Part A How many 3d electrons are in V ? Express your answer as an integer. Part B How many 5p electrons are in Ba ? Express your answer as an integer. Part C How many 5d electrons are in Pb ? Express your answer as an integer. Part D How many 7s electrons are in Ra ? Express your answer as an integer.

part a-3 part b -6 part c-10 part d-2

Part A How many 3d electrons are in Fe ? Express your answer as an integer. Part B Part complete How many 5p electrons are in Ba ? Express your answer as an integer. Part C How many 4d electrons are in I ? Express your answer as an integer. Part D How many 4s electrons are in K ? Express your answer as an integer.

part a-6 part b-6 part c-10 part d-1

The smallest particle of light is called a ________.

photon

Barium is a(n) ________ block element.

s

Calcium is a ________ block element.

s

What element has the electron configuration 1s22s22p63s23p2?

silicon

The shape of an s electron level is ________.

spherical

The electron configuration of an atom shows...

the number of electrons in each electron energy level.

What do the elements Ca, Sr, and Ba have in common in terms of their electron configuration?

they have the same number of valence electrons

What do the elements O, S, and Se have in common in terms of their electron configuration?

they have the same number of valence electrons

Which has a higher frequency?ultraviolet radiation or infrared radiation

ultraviolet radiation

The chemical properties of representative elements are mostly due to the

valence electrons

All electromagnetic radiation travels at the same ________.

velocity

Electromagnetic radiation normally travels in the form of ________.

waves

The symbol for wavelength of electromagnetic radiation is ________.

λ

What is its wavelength in meters? Express your answer to two significant figures and include the appropriate units.

λ = 5.9×10−7 m

What is its wavelength in nanometers? Express your answer to two significant figures and include the appropriate units.

λ = 590 nm

the symbol for the frequency of electromagnetic radiation is ________.

ν (not the one that looks more like a u)

What is the difference between "white" light and blue or red light?

"White" light has all the wavelengths of the visible spectrum, red and blue light have specific wavelengths.

The principal quantum numbers have the designation ________.

1, 2, 3...

What is meant by an energy level, a sublevel, and an orbital? (Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.) 1._______contains all the electrons with similar energy. 2.______ is the region around the nucleus where electrons of a certain energy are most likely to be found. 3.______contains all the electrons with the same energy.

1. An energy level 2. An orbital 3. A sublevel

Select the element in each pair with the higher ionization energy. 1.F or Cl 2.Mg or Sr 3.Si or S 4.Br or Kr

1. F 2.Mg 3.S 4.Kr

Consider three elements with the following abbreviated electron configurations:X = [Ar]4s23d5 Y = [Ar]4s23d104p1 Z = [Ar]4s23d104p6 1.Identify element X as a metal, metalloid, or nonmetal. 2.Identify element Y as a metal, metalloid, or nonmetal. 3.Identify element Z as a metal, metalloid, or nonmetal. 4.vWhich element has the smallest atomic radius? 5.Which element has the highest ionization energy? 6.Which element has a half-filled sublevel?

1. metal 2.metal 3.nonmetal 4.Z 5.Z 6.X

_____uses the symbol of the preceding noble gas to show completed sublevels. _____shows the number of electrons in each sublevel of an atom.

1.Abbreviated electron configuration 2.Electron configuration

______shows the number of electrons in each sublevel of an atom. ______shows the electrons as arrows in each orbital of an atom sublevel.

1.Electron configuration 2.orbital diagram

Select the larger atom in each pair. 1.K or Br 2.Mg or Sr 3.Na or Mg 4.Rb or I

1.K 2.Sr 3.Na 4.Rb

Select the more metallic element in each pair. 1.Sn or As 2.I or At 3.Sr or Ba 4.Cs or Au

1.Sn 2.At 3.Ba 4.Cs

1. 5s and 6s orbitals Check all that apply. 2. 2p and 3p orbitals Check all that apply. 3.3p and 4d sublevels Check all that apply. 4.3s and 3p orbitals Check all that apply.

1.They have the same shape. The maximum number of electrons is the same. 2.They have the same shape. The maximum number of electrons is the same. 3.None of these 4.They are in the same energy level.

1.Going down Group 6A (16), the ionization energy ___ . 2. Going down Group 6A (16), the atomic size ___ . 3. Going down Group 6A (16), the metallic character _____ . 4. Going down Group 6A (16), the number of valence electrons ____ .

1.decreases 2.increases 3.increases 4.remains the same

1.Going from left to right across Period 3, the ionization energy ___. 2. Going from left to right across Period 3, the atomic size ___. 3. Going from left to right across Period 3, the metallic character ___. 4. Going from left to right across Period 3, the number of valence electrons ____.

1.increases 2.decreases 3.decreases 4.increases

Describe the shape of the following: 1. 2s- 2.4p- 3.5s-

1.spherical 2.two-lobes 3.spherical

Any d sublevel can hold up to ________ electrons.

10

Where are O, S, and Se located in the periodic table?

16

The maximum number of electrons that may occupy the third electron energy level is ________.

18

What is the electron configuration for aluminum?

1s2 2s2 2p6 3s2 3p1

What is the correct electron configuration for the lithium atom?

1s22s1

What is the electron configuration for potassium (atomic number 19)?

1s22s22p63s23p64s1

A p orbital has ________ lobes.

2

An s orbital can hold ________ electrons.

2

Where are Ca, Sr, and Ba located in the periodic table?(enter as a group number and if they have the same valance electrons they are going down in the table)

2

Which of the following orbitals are possible in an atom ? Check all that apply.

2s 5f and 3s

The number of electron levels (not sublevels) in a magnesium atom is ____.

3

The visible light spectrum covers the wavelength range ________.

400 to 700 nm

What electron sublevel starts to fill after completion of the 5s sublevel?

4d

Green light has a wavelength of 510 nm. What is the wavelength in m?

5.1 × 10-7 m

Any p sublevel (set of p orbitals) can hold up to ________ electrons

6

part A-orbitals in the 3p sublevel Express your answer as an integer. part B-sublevels in the n = 2 energy level Express your answer as an integer. part c-orbitals in the 5s sublevel Express your answer as an integer. Part D-orbitals in the n = 2 energy level Express your answer as an integer.

A-3 B-2 c-1 d-4

Which has a longer wavelength? AM radio waves have a longer wavelength. TV Channel 2 has a longer wavelength. Both have approximately the same wavelength.

AM radio waves have a longer wavelength.

What element has the electron configuration 1s2 2s2 2p6 3s2 3p1?

Al

What is similar and what is different about the valence electrons of the elements in a group?

All the elements in a group have the same number of valence electrons. As you go down the group, the valence electrons are farther from the nucleus.

What is the symbol of the element with the electron configuration1s22s22p63s23p64s23d104p5?

Br

Why is the ionization energy of Ca higher than that of K?

Ca has a greater number of protons than K

What element has the electron configuration 1s22s22p63s23p5?

Cl

Even though H has only one electron, there are many lines in the atomic spectrum of H . Explain.

Different lines are generated by different H atoms. There are several other particles within the H atom. There are many energy levels within the H atom

What element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d6?

Fe

What element has the electron configuration 1s22s22p63s2?

Mg

Indicate the maximum electrons in each of the following: Part A-3s sublevel Express your answer as a integer. part B-4p sublevel Express your answer as a integer. Part C-energy level n=4 Express your answer as a integer. Part D-6p sublevel Express your answer as a integer.

Part A-2 Par B-6 PartC-32 Part D-6

Which has a higher energy? AM radio waves have a higher energy. TV Channel 2 has a higher energy. Both have approximately the same energy.

TV Channel 2 has a higher energy.

What element has the electron configuration 1s22s22p63s23p64s23d2?

Ti

What element has the electron configuration 1s22s22p63s23p64s23d3?

V