Periodic Table
Periodic Table Trends
Atoms
Reactivity
Ionic and Molec Cpmds
Atomic History/Model
100
The element on period 4, group 3.
What is Scandium?
100

The electrons in the outermost energy level of an atom.

What are valence electrons?
100
This subatomic particle has a positive charge.
What is the proton?
100
Reactivity of an atom depends on these two things.
What are valence electrons and atomic radius
100
Molecular compounds share electrons in a ___________ bond.
What is "covalent"?
100
The word atom comes from this Greek word.

What is atomos.

200
An element in period 3 that has one valence electron.
What is Sodium?
200
The element with the largest atomic radius in group 2.
What is Radium?
200

The atomic mass/mass number for an atom with 6 protons and 7 neutrons.

What is 13 AMU?
200
The least reactive of these two: O (oxygen) or F (fluorine).
What is "oxygen"?
200

The one that is the ionic compound out of these two: NaF or CO2

What is NaF?
200
The first scientist to discover that all matter was made up of atoms.
Who is John Dalton?
300

Are dull, mostly gases and liquids, have a low melting point, and are poor conductors.

What are non-metals?
300
The element with the most valence electrons in period 4.
What is Krypton?
300
The part of the atom where most of the mass is located.
What is the nucleus?
300
Metals become more reactive as you move _________ a group.
What is "down"?
300
Two non-metals form this type of compound.
What is a molecular compound?
300
This scientist came up with the plum-pudding model (positive pudding, negative raisins).
Who is "J. J. Thomson" (Joseph John Thomson)?
400
The smallest halogen atom.
What is Helium?
400
The valence electrons are _____________ as you go across a period from left to right.
What is "increasing"?
400
The charge carried by a Calcium ion.
What is +2?
400
The most reactive metal from the first 20 elements.
What is K (Potassium)?
400

The type of attraction that forms ionic bonds between two oppositely charged ions.

What is electrostatic attraction?
400
The order of atomic theory contributors, from earliest to most recent.
Who are "Democritus, Dalton, Thomson, Rutherford, Bohr"?
500
The smallest atom out of the metalloids.
What is Boron?
500
The number of valence shells are ____________ as you go up a group.
What is "decreasing"?
500
The standard atomic notation for isotope Fluorine-20.

What is 209F?

500
A Chlorine atom is most likely to ________ electrons in a reaction with a metal.
What is "gain"?
500

4 properties of molecular compounds.

What are low melting point, insoluble in water, non-conductive, gas, liquid or low melting solid at room temperature.

500
Alpha particles bouncing back from gold foil lead to the discovery of this subatomic particle.
What is a proton?
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