Misc.
Who organized the periodic table as we know it?
Dmitri Mendeleev
How can you find the amount of neutrons in an atom?
Mass - protons
What are valence electrons?
The outermost electrons in an atom
What is the Lewis structure for nitrogen (N) ?
N with 5 dots
What happens to to the ionization energy as you go across a row (left to right)?
It goes up
Name an example of a halogen
F, Cl, Br, I
What is the atomic symbol of iron?
Fe
How many valence electrons does calcium (Ca) have?
2
What is the Lewis structure for strontium (Sr)?
Sr with 2 dots
Which has HIGHER metallic character, Be or Sr?
Sr
Name an example of an alkaline earth metal
Be, Mg, Ca, Sr, Ba, Ra
What is the name of group 1?
Alkali metals
How many valence electrons does Nitrogen (N) have?
What is the Lewis structure for potassium (K)?
K with 1 dot
Which has HIGHER ionization energy, K or Br?
Br
What are columns in the periodic table called?
Families/groups
How many protons, electrons, and neutrons are in selenium (Se)?
p+: 34
e-: 34
n: 79-34 = 45
How many valence electrons does fluorine (F) have?
7
What is the Lewis structure for silicon Si)?
Si with 4 dots
What happens to atomic radius/size as you go across a row?
It gets smaller
What are rows in the periodic table called?
Periods
How many protons, electrons, and neutrons are in ruthenium (Ru)?
p+: 44
e-: 44
n: 101-44 = 57
How many valence electrons does xenon (Xe) have?
8
What is the Lewis structure for helium (He)?
He with 2 dots
Which has a LARGER atomic radius/ atomic size, O or Cs?
Cs