Periodic trends
Who was the scientist that organized the elements?
What was special about his periodic table?
Dmitri Mendeleev
He left blank spaces and hypothesized elements based on periodic trends
How does my atomic radius change when I have an anion?
Cation- decrease
anion- increase
Rank the following elements in increasing atomic radius: Fluorine, Barium, magnesium, aluminum
fluorine, aluminum, magnesium, barium
Which element is the most electronegative?
Fluorine
What type of alloy would form between copper and zinc?
Substitutional Alloy
What is the periodic law?
Physical and chemical properties of elements are periodic functions of their atomic numbers
(properties repeat)
As you go down a group, does the atomic radius increase or decrease?
As you go across a period, does the atomic radius increase or decrease?
Increases down a group
decreases across a period
What is ionization energy?
Which has a higher first ionization energy?
Beryllium or fluorine?
The energy required to remove one electron
Fluorine
Put the elements in order of increasing electronegativity: sulfur, zirconium, zinc, cesium
Cesium, zirconium, zinc, sulfur
Cesium
What are the group 1 element called?
Alkali metals
What is electron shielding?
Electrons on the innershell shield the positive pull of the outer electrons
How is the first ionization energy different from the second ionization energy?
First ionization energy is removing 1 electron, second ionization energy is removing 2 electrons.
As you move down a group, does it increase or decrease?
across increase
down, decrease
Cast irons are made of carbon and iron, what type of alloy would this be?
Interstitial
Why don't elements in group 8 react? What are they called?
Noble Gases, 8 valence electrons
Order the following elements in decreasing atomic radius: Osmium, fluorine, strontium, tin,
strontium, osmium, tin, fluorine
Which of the following group 2 elements has the lowest first ionization energy?
Be, Mg, Ca, Ba
Barium
it has a large atomic radius so it s easy to get rid of an electron
What is ionization energy?
How much energy it takes to remove 1 electrons
What is the formula for density? Is density a chemical property of metals?
Mass/volume