Chapter 5: Electrons in Atoms
What are the units of frequency?
Hz (hertz) or 1/s
The alkali metals and halogens are both examples of ________ in the periodic table.
Groups.
What is the quantity of a mole?
6.022 x 10^23
What is the first step in performing stoichiometry?
Balance the chemical equation!
Which country has the largest population on Earth?
China (1.42 billion)
The wavelengths of radiowaves are longer than the wavelengths of infrared waves. Which type of light has higher energy?
Infrared waves.
What are two common properties of metals?
Shiny, smooth, solid at room temperature, conduct electricity.
How do you find the moles of something when given its mass in grams?
Divide by molar mass.
If you have 32 grams of oxygen and 6 grams of hydrogen, what is the molar ratio of oxygen to hydrogen?
1 : 3
How many members does the k-pop band SEVENTEEN currently have?
13.
An atom is in the _________ when all of its electrons are in their lowest possible energy orbitals.
Ground state.
As you go left and down the periodic table, what generally happens to the atomic radius of elements?
Atomic radius increases.
What is greater, a mole of carbon dioxide (CO2) or a mole of methane (CH4)?
They are the same.
Limiting reactant.
What is the highest-selling manga of all time?
One Piece.
What is the maximum number of electrons that can be held in an f suborbital for any given energy level?
14 electrons.
Which element has the highest electronegativity?
Fluorine
What is one use of hydrates?
Preserving electronics, solar panels, etc.
What is the coefficient of oxygen in the combustion of ethanol (C2H5OH)?
3
Who is the current prime minister of the United Kingdom?
Boris Johnson.
1s2 2s2 2p6 3s2 3p6 3d10 4s1
Why is the third ionization energy for magnesium much higher than the third ionization energy for aluminum?
Because the third ionization energy of magnesium involves removing a 2p electron while the third ionization energy of aluminum is only removing the final 3s electron.
When did Amedeo Avogadro discover the mole?
1811.
What are the four meanings of the word "mole?"
mole in chemistry, mole on the skin, mole animal, and a mole in an organization (spy).
What room in the house do ghosts avoid?
The living room.