Atoms and Elements
The atomic number of an element represents something specific.
What are the number of protons?
This unit measures the volume of a liquid.
What are millileters?
Changes that create new substances
What is a chemical change?
Make an observation.
What is the first step in the scientific process?
Protons, neutrons, and electrons in an atom.
What are the three main particles in an atom?
On the periodic table, elements in the same column.
What are groups?
A liquid has a mass of 250 grams and fills a 500 mL container. These are the components of a formula.
What is the density formula?
A change in color.
What is sign of a chemical reaction?
Independent variable
In an experiment, what is the variable that is changed called?
In the nucleus of the atom.
Where are protons located in an atom?
This is mostly what the atomic mass of an element is.
What are protons and neutrons
This is used to measure the volume of an irregular solid like a rock
What is the displacement method?
Vinegar and baking soda.
What is an example of a chemical reaction?
Repeating experiments multiple times.
How can scientists ensure that their results are reliable?
Neutral charge.
What is the charge of a neutron?
This subatomic particle in an atom has a negative charge.
What is an Electron?
Scientists have a preference for the metric system because
Multiples of ten
Oxidation on the copper statue of liberty
What is an example of a chemical reaction?
A hypothesis in the scientific process.
What is a testable prediction?
Two electrons in the shell of an atom.
What is the maximum number of electrons in the first shell of an atom?
This is true of about elements in the same group on the periodic table.
What are having the same chemical properties?
The most appropriate standard unit for the weight of a car.
What are tons
Ice melting.
what is an example physical change?
What is the purpose of a control group in an experiment?
Atoms with the same number of protons but different numbers of neutrons.
What is an isotope?