Name an element located in Group 1 of the periodic table.
What is H, Li, Na, K, Rb, Cs, Fr?
100
A possible answer to a testable scientific question is known as _______.
What is hypothesis?
100
Particles with a neutral charge are found in what part of the atom?
What is the nucleus?
100
Cutting paper is an example of this type of change.
What is physical?
100
Draw an example of a compound particle diagram.
What is .....
200
Name an element that is located in Period 3 of the periodic table.
What is Na, Mg, Al, Si, P, S, Cl, Ar?
200
A chemist hypothesizes that mercury oxide (HgO) will undergo a decomposition reaction if it reaches a certain temperature. When the chemist designs his experiment, what should be the only independent variable?
What is temperature?
200
This type of particle is positively charged and located inside the nucleus.
What is proton?
200
Provide an example of a chemical change.
What is ....
200
A substance that is composed entirely of atoms which all have the same number of protons in their nuclei is known as _______.
What is an element?
300
Elements on the periodic table are organized in order of this.
What is atomic number?
300
A scientist described a sample of a thin film of metal grown on a glass slide as "brown and semi-transparent." This statement is best classified as what type of observation
What is qualitative?
300
If an electron is in an excited state, it must lose energy when it falls to a lower state. What happens to the energy that is lost?
What is released as electromagnetic radiation (light)?
300
The properties which can be observed without changing the identity of the substance.
What is physical?
300
The smallest part of an element that cannot be broken down by ordinary chemical means
What is an atom?
400
The elements in the periodic table that have a completely filled outer subshell.
What are noble gases?
400
Carrie is performing an experiment on acids and bases, so she forms the following hypothesis.
If an acidic solution is added to a basic solution,
the pH of the resultant solution will decrease.
What is the dependent variable in Carrie's experiment?
What is the pH of the resultant solution?
400
A particle that has a negative charge should be found in what part of an atom?
What is the electron cloud?
400
The properties which require a chemical reaction to be observed.
What is chemical change?
400
All matter, both living and nonliving, is made up of tiny particles called _______.
What are atoms?
500
The atomic number of an atom is always equal to the number of _______ in an atom.
What are protons?
500
A simplified representation of an object, structure, or system used in analysis, explanation, interpretation, or design is called
What is a model?
500
Atoms have been traditionally viewed as being composed of three different types of particles: protons, neutrons, and electrons. However, research done by Louis de Broglie and expanded upon by Erwin Schrödinger changed how scientists viewed electrons.
We now know that electrons behave in what two ways?
What are particles and waves?
500
Provide an example (other than tearing paper) of a physical change.
What is ...
500
For something to be considered matter, is must have what two properties?