Early Periodic Table
How was the early periodic table arranged?
It was arranged by increasing atomic mass and similar chemical properties.
In which direction on the periodic table does metallic character increase?
It increases diagonally to the right.
Which group is Au a part of?
Metals
Who was responsible for the early periodic table?
Dmitri Mendeleev
What does Re represent on the periodic table?
Rhenium
What improvement did Mosley make to the early periodic table?
He proposed that elements should be arranged by atomic number.
what way does the electron negativity go?
right and up
All group 12 elements have a ____valence electron configuration.
Who founded the Bohr model?
Niels Bohr
What is the atomic number for potassium?
19
How did Moseley improve the periodic table?
He used atomic numbers instead of atomic mass
Which way does the atomic radius go?
down and left
Which group is Ra a part of?
alkaline earth metal
Newlan's idea of octaves did not work well for elements with atomic numbers higher than calcium.
true or false?
true
Draw the element Kr
protons: 36
Neutrons: 48
Electrons: 36
To leave space for undiscovered elements
Which trend(s) increase as you travel up the periodic table?
the lathenides are found in _____ group of the periodic table
3
How was Meyer's periodic table grouped?
Period five of the periodic table contains___elements
What was the law of octaves?
An early attempt to organize chemical elements by arranging them in order of increasing atomic weight, stating that properties repeat every eighth element
True or False: Metals tend to form cations
True
The group 14 elements have the electron configuration___.
ns2np2
Which element is named after the founder of the periodic table?
Mendelevium
Which category of element appears shiny but is brittle?
Metaloids