Elements, Compounds, and Mixtures
A molecule(s) with only a single type of atom.
What is an element?
What is a reactant?
A compound or element that reacts.
Energy traveling in electromagnetic waves. It does not need matter to pass through.
What is radiation?
What shape or form does energy usually travel in?
Waves
What is a vector?
A molecule(s) made up of more than one type of atom.
What is a compound?
Balance the following equation:
CO2+H2O --> C6H12O6+O2
6 CO2+6 H2O --> C6H12O6+6 O2
The transfer of energy through direct contact, usually involving solids.
What is conduction?
What are parallel waves?
Waves that travel the same way that it vibrates.
Is speed a vector?
No, because it is only measures magnitude, not direction.
Two or more different compounds physically combined.
What is a mixture?
What are catalysts?
Catalysts are compounds/elements that speed up a reaction by lowering the activation energy. They don’t react with other molecules to form new things.
The transfer of energy through fluids in currents.
What is convection?
What are transverse waves?
Waves of energy that move perpendicular to the direction of the crests and troughs.
What are 2 examples of vectors?
Velocity: speed in a specific direction
Momentum: mass x velocity
Acceleration: how much velocity changes by
Do you get an element, compound, or mixture when combining 2 moles of Chlorine and 1 mole of Beryllium to completion?
Compound, as they will react to create BeCl2.
What are intermediaries?
Intermediaries are compounds/elements that are formed and reacted in the reaction. They don’t appear in the full chemical equation.
Which type of energy transfer is boiling water?
Convection, because water is fluid, and the heat from the stove moves to the water. The water goes into convection currents to spread the heat around.
When a ball is at the top of a slope, what energy does it have?
Potential energy/gravitational potential energy.
If you are standing still, describe the forces acting on you. Are they balanced?
Yes, they are balanced. Gravity and the floor pushing upwards against gravity just enough. There is also equal amount if pressure from all four other sides of you.
Do you get an element, compound, or mixture when combining 1 mole Boron and 1 mole Krypton under standard conditions?
Mixture, as krypton is a noble gas. It does not react with elements except a few under extreme conditions.
What are the reactants, intermediaries, and products of the full reaction of the following half- reactions? Make sure to balance the equations!
A+B=2C+D
A+2D=C+E
3A+2B=5C+E
3A, 2B are reactants
5C, E are products
2D is intermediary
What energy comes from a fire?
Radiation and thermal heat.
What are 5 types of energy besides potential and kinetic?
Chemical, elastic, gravitational, mechanical, electrical, light, sound, nuclear, heat.
When you are running, what forces are acting on you? *name at least 3
Friction, when your feet push against the ground
Gravity, so you stay on the ground
Velocity, direction and speed
Acceleration, momentum, air resistance...