is found by adding the number of protons and neutrons
Mass
100
releases energy
Exothermic reaction
100
distance covered/time took to travel the distance
Speed
100
net force is 0 (no change in motion or object stays at rest)
balanced force
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
electrons
200
Force =
mass time acceleration
200
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
outermost electrons are called
Valence electrons
300
Forces in opposite directions are
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
Elements to the left of the Periodic Table
Metals
400
Which one is a compound: O2 or CO2 where 2 is the subscript
CO2
400
Difference between speed and velocity
Velocity has a specific direction but speed does not
400
sub atomic particles responsible for the Mass of an atom
Protons and Neutrons
500
An atom has 9 protons, 10 neutrons and 7 valence electrons. What is the element?
fluorine
500
What is a precipitate?
A solid sank to the bottom of a container when 2 solutions were mixed
500
Find the person's average speed in km/hr if he walks 2 km in 30 mins
4 km /hr
500
A cart is moving west at a constant speed when acted upon by a force of 20 N to the North and 20 N to the South. The cart's speed and direction stay the same because
The new forces are balanced
500
3 steps to find out if an equation is balanced
1: count the number of atoms on the left hand side (Reactants)
2: count the number of atoms on the right hand side (Products)
3: Compare both the sides. If same for each element then balanced