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periodic Table
Chemical Bonds
Classification of Matter
Atoms
Changes in State/matter and Temperature
100
A molecule composed of two atoms of the same element
What is a Diatomic Molecule
100
When electrons are transferred from atom to atom
What is an Ionic bond
100
elements combine to form...
What are compounds?
100
Democritus is best known for developing this.
What is the earliest model of the atom?
100
The amount of energy needed to change a material from a solid to a liquid state.
What is the heat of fusion?
200
horizontal rows of the periodic table
What are Rows: Periods
200
A chemical bond that occurs when atoms share electrons
What is a covalent bond?
200
A change in size, shape, or state of matter.
What is a physical change?
200
A certain atom has 26 protons 26 electrons, and 30 neutrons and ______ mass number.
What is 56?
200
The amount of energy needed to change a material from a liquid state to a gas.
What is the heat of vaporization?
300
Elements in Groups 3 through 12
What are transition metals
300
In a chemical formula, the ratio of atoms in the compound is shown by numbers. These numbers are called....
What is a subscript
300
Matter that is an element or compound.
What is substance?
300
Each inner energy level of an atom has a maximum number of electrons it can hold. the maximum number is..
What is 2?
300
State of matter depends on this.
What is temperature?
400
Cobalt, iron, and nickel are metallic transition elements that are....
What are magnetic
400
Another name for a homogeneous mixture.
What is a solution?
400
Every element has one. It consists of one capital letter or a capitol and one or two lower case letters.
What is a chemical symbol.
400
The 4 states of matter are..
What is solids, liquids, gas, and plasma?
500
Elements that lie along the stair-step line of the periodic table
What are metaloids
500
The elements that make up a compound and the ratios of the atoms of those elements can be shown in a...
What are formulas?
500
The scattering of light by colloids.
What is a heterogeneous mixture?
500
A particle that moves around the nucleus.
What is an electron
500
the kinetic theory of matter is....
What is the theory that all matter is made up of constantly moving, tiny particles?