Atomic structure
This is the name of the tiny particle that makes up all matter.
What is an atom?
This is the chemical symbol for oxygen.
What is O?
This is the name of the physical change that happens when ice is heated.
What is melting?
This property allows metals to conduct electricity through their wires.
What is being a good conductor of electricity?
In a word equation, this is the name for the starting substances written before the arrow.
What are reactants?
These are the three subatomic particles found inside an atom.
What are protons, neutrons and electrons?
This is the name for a substance made of only one type of atom.
What is an element?
Boiling water is this type of change, not a chemical one.
What is a physical change?
On the periodic table, metals are mostly found on this side.
What is the left side?
In a word equation, this is the name for the new substances written after the arrow.
What are products?
This negatively charged particle orbits the nucleus of an atom.
What is an electron?
This is formed when two or more atoms are chemically joined together.
What is a molecule (or compound)?
This is one visible sign that a chemical reaction has occurred, such as bubbles or a colour change.
What is a sign of a chemical reaction (gas produced, colour change, temperature change, or a solid forming)?
This term describes a metal's ability to be hammered into flat sheets without breaking.
What is malleable?
This symbol is used in a word equation to show the direction a reaction proceeds.
What is an arrow (→)?
An element's atomic number equals the number of these particles.
What are protons?
This is the chemical formula for water.
What is H2O?
This term describes a chemical reaction that releases heat energy to its surroundings.
What is an exothermic reaction?
This non-metal element is a liquid at room temperature.
What is bromine?
This is the word equation for the reaction between iron and sulfur.
What is iron + sulfur → iron sulfide?
This term describes atoms of the same element that have different numbers of neutrons.
What are isotopes?
This is the chemical symbol for the element tungsten.
What is W?
This is the name for a new insoluble solid that sometimes forms when two solutions react together.
What is a precipitate?
This term describes elements that show properties of both metals and non-metals, such as silicon and boron.
What are metalloids (semi-metals)?
This is the complete word equation for the combustion of methane in oxygen.
What is methane + oxygen → carbon dioxide + water?