The smallest particles of an element that have the same chemical properties as the element.
What are atoms
100
Any solid, liquid, or gas
What is matter
100
A particle with no charge, located inside an atom's nucleus.
What is a neutron
100
An amount of space taken up by an object.
What is volume
100
An element that conducts heat and electricity well is most likely to be in which category of the periodic table?
What is metal
200
What is a proton and where can it be found?
*BONUS* - How do we know how many protons an element has?
Particle that is positively charged and it can be found in the nucleus.
*Look at the element's atomic number*
200
Why is an atom electrically neutral?
Equal number of protons and electrons
200
Can be observed without changing the identity of the substance.
What is physical property
200
A way of describing a substance by how it reacts to other substances.
What is chemical change
200
Atoms of different elements may chemically combine to form what?
A compound
300
Densest part of an atom where most of its mass is located.
What is the nucleus
300
Any change in matter that does not form a new substance.
What is physical change
300
A chemical reaction that absorbs heat. Give an example.
What is endothermic. A pot on a stove.
300
What is the correct formula for finding density?
What is D=m/v (or volume divided by mass)
300
Give three examples of how to look for physical properties.
*BONUS* Name three more
What is odor, hardness, color, shine, density, state, shape, etc.
400
Chemical reactions that give off heat
What is exothermic
400
What does the chemical formula CO2 indicate?
There are two Oxygen atoms for every one Carbon
400
What are some (give 2) signs that indicate a chemical change has taken place?
What is color change, heat and light are given off, gas is produced, powdery substance settles out of a liquid.
400
Calculate how many neutrons there are in the element Sulfur.
16 Neutrons
400
How many electrons can fit in each valence of an atom?
What is 2,2,8
500
A particle with unequal number of protons and electrons.
What is an ion
500
What information can you get from the periodic table?
Atomic number, number of protons, number of electrons, atomic mass, number of neutrons, element name, and whether it is a nonmetal, metal, or metalloid.
500
Could an element be found in two different places in the periodic table? Why or why not?
No, because the elements are arranged in order of increasing atomic number.
500
Explain how molecules are arranged in a solid, liquid, and gas. Now, if I leave a can of soda outside in the winter, what is actually happening to the soda when it freezes?
What is water expands, the particles are forming close together.
500
Write the chemical compound for Sodium and Chlorine.