Scientific Method
Matter
Changes In State
Atoms Vocab
Atoms
100
What's the first step of the scientific method?
curiosity/observation/testable question
100
If I take the mass of some type of matter, divided by the volume of this particular substance, what will this tell me?
Density!
100
Changing from a liquid to a gas is called
vaporization
100
What is an atom?
The smallest particle that can still be considered to be an element. It has a proton, neutron, and an electron.
100
Helium has an atomic number of 2. If one particular atom of Helium has a mass number of 5, how many neutrons does it have in the nucleus?
3
200
What is the correct format for a hypothesis?
if.....then....because
200
If I have an irregularly shaped item, how can I find its density?
First weigh it, then use water displacement to find its volume. Then do mass divided by volume.
200
Matter transitioning straight from a solid to a gas is called
sublimation
200
What is a proton and where is it located in an atom?
A proton is the positively charged particle in an atom. It is located in the nucleus of the atom!
200
An atom of Bromine has a mass number of 80. It's atomic number is 35. How many neutrons are in its nucleus?
45
300
Give us a good example of a proper hypothesis.
Various
300
Please provide on example of a physical change, and one example of a chemical change!
various
300
An ice cube is taken out of the freezer. After an hour it has turned into a puddle of water on a desk. After two days, the desk is completely dry, even though no one touched anything? What changes in state occurred and why?
WOW!
300
What is an electron?
An electron is a negatively charged particle in an atom. It is located in the outer ring of the atom. Electrons are extremely small compared to protons and neutrons.
300
Nickel has an atomic number of 28. How many protons does it have if it has a charge of -2?
30
400
What do you do after you conduct an experiment?
Form a conclusion.
400
Please describe how the motion of gas particles are related to the pressure exerted by the gas.
Pressure is a measure of the outward push divided by the area of the container. If I increase the area with the same force, the pressure will decrease. The opposite is true. If I increase the outward force of the gas in the same space, this will also increase the pressure. The opposite is true in this case as well.
400
Describe what the particles look like in all three states of matter.
Solid, slowest. Liquid, faster. Gas, fastest. This is related to thermal energy.
400
Go to my periodic table. What element has an atomic number of 47? What does this tell us about this element?
How many protons it has in its nucleus: 47
400
In nature, about 99% of Uranium has a mass number of 238. Its atomic number is 92. How many neutrons?
146
500
Provide an example of a science experiment, going through every step of the scientific method!
Good luck!
500
Provide an example of an endothermic reaction.
One example is the baking soda and vinegar mini lab that we completed. The temperature goes down, which means that energy is being absorbed.
500
H20 exists only in gas form when it reaches 100 degrees Celsius. Copper is a solid until the temperature of 1064 degrees Celsius. How is this possible?
Each substance has its own specific freezing, melting, and vaporization temperature.
500
How are the atomic numbers and mass numbers for an element different?
WOW!
500
An unknown element has a mass number of 127. It has 74 neutrons. If it has a charge of +4, how many electrons?
49
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