Matter and Atoms
This is the smallest unit of an element that retains the properties of that element.
What is the atom?
The periodic table contains this type of substance.
What are elements?
When a new substance is made, this has occurred.
What is a chemical reaction?
This is the pH of a neutral solution.
What is 7?
A written guess about what will happen in an experiment.
What is a hypothesis?
A change of state from a liquid to a gas
What is evaporation?
This element has the chemical symbol “Na”.
What is sodium?
The substances you start with in a chemical reaction are called this.
What are reactants?
Substances with a pH lower than 7 are called this.
What is an acid?
This is the first step in the scientific method.
What is asking a question or identifying a problem?
These three particles make up an atom.
What are protons, neutrons, and electrons?
The periodic table is arranged in order of increasing this.
What is the atomic number?
The products of photosynthesis.
This acid is found in citrus fruits like lemons and oranges.
What is citric acid?
The variable that you change in an experiment is called this.
What is the independent variable?
The particle that determines the type of element.
What is a proton?
These elements are found on the far right of the periodic table and are very unreactive.
What are the noble gases?
A fast, exothermic reaction between a fuel and oxygen often results in this.
What is an explosion?
This is the general name for a reaction between an acid and a base.
What is neutralisation?
These are the parts of an experiment that must be kept the same.
What are controlled variables?
This term describes a substance made of two or more different atoms chemically bonded.
What is a compound?
This term describes elements with properties of both metals and nonmetals.
What are the metalloids?
The gas that is produced when acids reacts with metals.
What is hydrogen?
This indicator turns red in acidic solutions and blue in basic ones.
What is litmus?
A graph should always include these three components.
What are a title, labelled axes, and units?