Matter
Matter takes up_______________.
What is matter takes up space and mass?
These positively charged particles determine the identity of an element.
What are protons?
This formula is used to calculate density.
What is mass ÷ volume?
Is condensation an example of an endothermic or exothermic change?
What is an exothermic change?
How do cold packs work? What type of reaction is occurring here?
What is through an endothermic reaction it absorbs heat from surroundings and undergoes a chemical change breaking the barrier triggering the reaction?
Particles with more energy move ___________ than particles with less energy.
What is particles with more energy move Faster and farther apart than particles with less energy?
This scientist discovered the nucleus using the gold foil experiment.
Who is Rutherford?
A rock raises the water level from 50 mL to 62 mL. What is its volume?
What is 12 mL?
This state of matter does not have a fixed shape or volume.
What is a gas?
Name between 6-7 total signs that a chemical reaction is occurring.
1. Bubbles
2. Sound
3. Precipitate forms
4. Odor
5. Color Change
6. Heat change
7. Formation of light
The process of changing to a gas from a solid is called sublimation. True or False
True
Atoms of the same element that have different numbers of neutrons are called this. Provide an example and the formula to find the isotope.
What are isotopes, what is carbon- 13, formula number of proton+ neutrons=isotope
This tool or method is used to measure the volume of irregular objects.
What is water displacement?
When fast-moving atoms or molecules hit slower-moving atoms or molecules and cause them to move faster, energy is transferred. The energy that is transferred is called heat. True or False
True
Changing the number of these particles would change the element into a different element entirely.
What are protons?
Compare the water molecules in different states (Ice vs. Water vapor)
Speed of molecules
Amount of movement
Arrangement of molecules
Distance between molecules
What are Ice: Slower, vibrate, orderly, slightly further apart than water?
What are Water vapor: faster, can bounce off each other, random, very far apart?
In the modern model of the atom, electrons are found here.
What is the electron cloud?
How does dissolving salt in water change the density of the water?
Dissolving salt in water adds mass to the water but does not increase the volume very much. Since D=m/v, if mass increases more than volume, the density will increase.
This phase change occurs when a gas becomes a solid without becoming a liquid first.
The number of neutrons found in aluminum- 27 atom is?
What is 14 neutrons?
When does an object gain thermal energy and when does it lose thermal energy? What type of reaction?
What are Gains--> when heat it added and particles move faster (endothermic)?
What are Loses--> when heat is removed and particles slow down (exothermic)?
An element and an atom are different but related because
A. A particular element is made up of many different types of atoms
B. A molecule is the same as an atom
C. An element is made up of all the same type of atom
D. An element is smaller than an atom
What is C. An element is made up of all the same type of atom?
You put cold water colored blue into room temperature water. The cold water sank in the room temperature water. Use what you know about the motion and attraction of molecules and density to explain why this happened.
Since the water was colder, the water molecules were moving slower, so their attractions brought them closer together. Since the molecules were closer together, there is more mass per volume of water. This makes the water more dense than room temperature water so the cold water sinks.
Describe how the motion and arrangement of water molecules change as ice is warmed and begins to melt.
As ice is warmed, water molecules begin to vibrate faster. Some of them have enough energy to slide past each other. As they do, the very orderly arrangement of water molecules in ice becomes more random.
I have one more proton than nickel, and one fewer proton than zinc. Who am I?
What is copper?