atomic sturtcure - maths

how to calculate relative atomic mass

how to calculate unknow relative abundance

assign one realtiev abundance as x

Assign other relative abundance as 100 - x

If we are given one reactive abundance and are asked to deduce the other relative abundances 

If the two relative abundances sum to 100%, then we can solve the equation by letting one relative abundance be x, and letting the other relative abundance be 100-x

If we are given one reactive abundance and are asked to deduce the other relative abundances

1. Return to our equation of relative atomic mass

2. Substitute out unknown values in 

3. Plug in the relative atomic mass of one substance (given in the question)

4. Solve to find x

• Multiply both espressions by 100

• Expand brackets 

• Collect like terms

• Rearrange to find x
  
  

speed and kinetic energy

The higher an object’s speed, the higher kinetic energy 

speed mass and kinetic energy

For a given mass, the higher an object’s speed, the higher its kinetic energy

State the formula for kinetic energy.

Mass = kg

V = m/s-1

Ke = Joules 

rearranging kinetic enegry formual

Write the equation for calculating the mass from kinetic energy, distance, and time of flight.

M = kg

Ke = J

Time = s

Distance = m

practice rearranging equation

pratice rearranging equaiton