An electron that is in the highest occupied energy level of an atom
What is a valence electron?
100
It cannot be broken down into simpler substances by ordinary chemical means
What is an element?
100
This molecule has a region with a slightly positive charge and a region with a slightly negative charge
What is a polar molecule?
200
The scientific method is an organized plan for these things
What is gathering information, organizing information, and communicating information?
200
This changes because the manipulated variable changes
What is the responding variable?
200
A model of an atom in which each dot represents a valence electron, and the symbol represents the nucleus and all the other electrons
What is an electron dot diagram?
200
A substance made of atoms of different elements bonded together in a certain ratio
What is a compound?
200
The attraction between a slightly positive hydrogen atom and a slightly negative atom
What is a hydrogen bond?
300
The hypothesis
What is a proposed answer to a question, either supported or not supported by the data, formed after gathering information about the phenomenon you are studying?
300
The information collected during an experiment
What is data?
300
Atoms join together in chemical reactions to become
What is stable?
300
An atom that has gained or lost one or more electrons
What is an ion?
300
A mixture in which one or more substances is dissolved
What is a solution?
400
Hypothesis testing
What is an experiment?
400
This is based on the data from the experiment, must state either support or nonsupport of the hypothesis, and comes after study of the data
What is the conclusion?
400
The central core of the atom
What is the nucleus?
400
This is formed by force of attraction between oppositely charged ions
What is an ionic bond?
400
A substance that releases a proton in solution, increases the H+ ion concentration, and has a pH less than 7
What is an acid?
500
Number of variables changed in a controlled experiment
What is 1?
500
It is well tested and has a lot of support
What is a theory?
500
This particle has a positive charge and is found in the nucleus
What is a proton?
500
They are formed when atoms share electrons
What are covalent bonds?
500
A substance that removes H+ ions from solution, has a pH greater than 7, and is commonly found in cleaning agents