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15 Cards in this Set

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What is the atom composed of?
The atom is composed of subatomic particles called protons, neutrons, and electrons.
Are most substances we see ionic? Explain.
no, They are not collections of electrically charged particles (ions), but are electrically neutral combinations called molecules.
In ionic bonding, the potential energy lowering must occur. But many times, it is not possible because of the great range of IE.
Eplain the formation of a hydrogen molecule
Before they join, the 1s orbitals of each H atom is only half-filled. When they join, they share each other's electrons, filling each other's 1s orbital pair.


More simply, an electron pair can be represented by a dash.
H-H
Eplain the formation of a hydrogen molecule
Before they join, the 1s orbitals of each H atom is only half-filled. When they join, they share each other's electrons, filling each other's 1s orbital pair.


More simply, an electron pair can be represented by a dash.
H-H
what is matter
Matter is anything occupying space and having mass; it is the material of the universe.
what is the octet rule?
a tendency of atoms in molecules to have eight electrons in their valence shells. (Two for hydrogen atoms.) The octet rule is a general rule, but is not followed by all molecules.
what is an example of a Crystalline?
diamond
example of amorphous
glass
solids
have definite shape and definite volume
speed
the time rate of motion
velocity
speed of certain objects
Acceleration
the rate of change of velocity
Newton's First Law of Motion
If there are no forces acting on an object, then it will continue to move along a staight line with uniform speed
Newton's Second Law of Motion
The effect of a force is to cause the object to accelerate in the direction of the force
Newton's Third Law of Motion
When one object exerts a force on another, the second object exerts a force of equal strength in the opposite direction.