Periodic Table
What is this chemical?
Na
Sodium
When did dinosaurs first appear?
In the Triassic period around 230 million years ago.
What does coulomb's law describe?
Electric charges
When electrons cannot be gained or lost, they are...
Shared
Which way does Atomic Radius increase on the periodic table?
It increases from up - down the periodic table.
What group are the Halogens in?
Group 17
How did the go extinct?
Believed to be caused by a giant meteor impact that drastically changed the Earth's climate.
What is the SI unit of charge?
Coulomb (C)
What things are shared in Ionic bonds?
Electrons
What is electronegativity?
What attracts electrons into a bond.
Where are the metalloids located?
The stair step between metals and non-metals
What is the longest dinosaur egg ever found?
It was measured around 2 feet long and belonged to the Macroelongatoolithus genus.
who formulated Coulomb's law?
Charles-Augustin de Coulomb
What is VSEPR stand for?
Valence Shell Electron Pair Repulsion theory.
In electronegativity, there is a scale from 0 - 4 that increases. Which element has the highest value on this scale?
Fluorine (F)
Who was the second person alive to have an element named after them?
Some dinosaurs had self-sharpening teeth?
True or False?
True
What is the formula for coulomb's law?
F = q1q2/r2
What kind of elements tend to covalently bond?
Metals
What is ionization energy?
The energy required to remove a valence electron from an atom
Who was De Chancourtios?
Recognized the repeating pattern of elements when ordered by atomic weight
Has it been believed some dinosaurs had feathers?
True or false?
True
What happens to the electrostatic force between two charges if they moved three times farther apart?
If the distance is tripled, the force will be one-eight of i's original value.
What is VSEPR?
It is a model used in chemistry to predict the three-dimensional shape of molecules based on the repulsion between electron pairs surrounding a central atom.
How is ionic radius measured?
By determining the distance between the nuclei of two adjacent ions in an ionic crystal structure.