Particles
What happens to the particles inside a syringe when the plunger is pushed down?
The particles move closer together
The particles move farther apart
More particles enter the syringe
There are fewer particles in the syringe
The air particles move closer together.
Which of the following always results from a chemical reaction?
Bubbles
Fire and smoke
Temperature change
A new substance
A new substance
A proton and a neutron are walking down the street.
The proton says, “Wait, I dropped an electron help me look for it.”
The neutron says “Are you sure?”
What does the proton reply?
I'm positive!
How many elements are in this chemical formula?
NaHCO3
Who was the person who helped create the periodic table of elements and found the gap to predict what new elements they might find?
Mendeleyv
When you have a balloon full of helium particles, what is in between each helium particle? (choose each right answer)
Space Nothing
Matter Particles
Air
Space, also known as Nothing
We were experimenting with baking soda and vinegar. We put the two substanes in a bottle and then sealed it with a balloon. The balloon started to inflate. Did a chemical reaction happen?
How do you know?
(Options: no new substance formed, the mixture bubbled, the substances mixed together, the white substance disappeared)
Yes, the mixture bubbled.
Online money has recently been discovered to be a not-yet-identified super heavy element. What is the proposed name?
The proposed name is: Un-obtainium
CaCl
What is the difference between and element and a substance?
An element is pure. It is only made of one type of atom and has its own symbol on the periodic table.
A substance can be an element or a combination of elements.
A football player pumps up a football until it is nice and tight and no more air can be pushed inside. Use the particle model to describe the air inside the soccer ball compared to the air outside the soccer ball.
The particles inside the ball are closer together and bounce into each other more than the particles outside the ball.
A student mixed two substances in a jar and then put a balloon on top to seal it. The mixture bubbled and the balloon inflated. Explain at the particle level why the balloon inflated. (use the words expand, inflate, space, substance, particle, chemical reaction)
The two substances mixed and created a chemical reaction. The bubbling is evidence that a new substance was created, which was a gas. The gas expanded as the chemical reaction occured since particles were moving around and bumping into the balloon. This inflated the balloon. Particles
The optimist sees the glass half full. The pessimist sees the glass half empty.
How does the chemist see the glass?
Completely full! Half with liquid and half with gas
What are the elements in this chemical formula?
H2O
Hydrogen and Oxygen
How many different types of particles are there in the world?
Millions or more because elements combine to form substances and there can be millions of combinations. A particle is the smallest piece of a substance while it is still that substance.
A soccer player pumps up the soccer ball so no more air can be pumped into it. Use the particle model to describe what happens if a sharp object creates a hole in the soccer ball.
Particles will rush out of the ball until the pressure is equal inside and outside the ball.
What is it called when two or more substances mix together and a new product is created. The two substances might fizz, bubble, change temperature, change color, or smoke.
Chemical Reaction
What kind of dogs do chemists have?
Laboratory Retrievers
Is bleach a pure substance?
NaClO
This is an uppercase i: I. This is a lowercase (L): l
No! It is a substance made of 3 elements.
How do the movement of the particles compare in a solid, liquid, and a gas?
The move fastest in a gas bouncing around all over teh place, medium in a liquid, and slowest in a solid as they are tightly bound without much room to move.
A plunger was pushed down onto a volume of air in a sealed syringe. Once the student let go, the plunger moved back to its original position. The teacher said "The system is stable or is at equilibrium."What does this mean at the particle level?
A) the pressure inside and outside the syringe is the same.
B) The # of particles inside and outside the syringe is the same.
C) The system is open to the outside air.
D) The air particles inside the syringe push the plunger up with the same force that the particles outside the syringe push the plunger down.
E) The number of particle collisions against the inside and outside of the plunger are the same.
A, D, E
Students put a white mystery mixture into a cup and added water to it. They noticed it started to fizz and so knew that a new product was being formed in the gas. Then they evaporated the wet mixture to see what happened. They noticed crystals that were long and skinny. What are two observations the students could make to help them identify the mystery mixture?
fizzing, long skinny crystals, white color
Why should you never trust atoms?
They make up everything.
How many of these chemical formulas have 3 elements?
H2SO4 CO2
O2 C6H12O6
NaHCO3
2
H2SO4
C6H12O6
Particle is the smallest piece of whatever it is so that it is still that thing.