Show:
Chemistry 1
Chemistry 2
Force and Motion 1
Force and Motion 2
Mix
100
Number of Protons and Neutrons together gives
the Mass of an Atom
100
What type of reaction releases energy
Exothermic reaction
100
distance covered/time took to travel the distance
Speed
100
When the net force is 0 on an object and there is not change in it's motion then the forces are
balanced
100
What causes an object that is at rest to stay at rest?
Inertia
200
smallest particle to retain the properties of an element
an atom
200
negatively charged particle are called
electrons
200
Force =
mass time acceleration
200
Newton's law that talks about "Forces act in Pairs"
Newton's 3rd law of motion
200
MAN stands for
Mass - Atomic Number = Neutrons
300
smallest particle of an atom
electron
300
Electrons in the outmost energy level are called
Valence electrons
300
How is the net force calculated for the forces acting in the opposite direction?
subtracted
300
amount of matter in an object is
Mass
300
it has a negative charge and much less mass than a proton
Electron
400
What are the elements to the left of the Periodic Table called?
Metals
400
Which one is a compound: O2 or CO2
CO2
400
Acceleration is the rate at which velocity changes over time. a = v/t. True or False?
Ture
400
What is the acceleration of 4 kg rock that is thrown with a force of 20 N?
a = F/m = 5 m/s2
400
An endothermic reaction is
the reaction that absorbs energy
500
An atom has 9 protons, 10 neutrons and 7 valence electrons. What is the element?
fluorine
500
What is the element with 3 valence electrons and 5 protons?
Boron
500
Which object has unbalanced forces acting on it?
1) boy running at 1 m/s 2) an airplane flying at 455 m/s 3) a car accelerating at at 2.3 m/s2
500
How is the net force calculated if the forces are acting in the opposite direction?
subtract the forces
500
An atom's mass is 200 and atomic number is 80. How many neutrons does the atom have?
120