That which occupies space and possesses rest mass, especially as distinct from energy.
What is Matter
100
chemical change is any change that results in the formation of new chemical substances.
What is Chemical changes
100
The basic unit of a chemical element.
What is an atom
100
A subatomic particle of about the same mass as a proton without an electric charge.
What is neutron
100
The number of protons in the nucleus of an atom which determines the chemical properties of an element in its place in the periodic table.
What is an atomic number.
200
Any property that is measurable whose value describes a state of a physical system.
What is Physical Properties
200
a part or aspect of something abstract, especially one that is essential or characteristic.
What is element
200
A group of atoms bonded together representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
What is a molecule
200
A stable subatomic particle occurring in all atomic nuclei with a positive electrical charge equal in magnitude to that of an electron but of opposite sign.
What is proton
200
One of the four principal condition in which matter exists, solid, liquid, gas and plasma.
What is the state of matter.
300
A change in which a substance changes from on physical state to another but no substances with different composition are formed.
What is Physical changes
300
A substance made by mixing other substances together.
What is a mixture
300
A firm, stable shape, not liquid or fluid.
What is a solid.
300
A stable subatomic particle with a charge of negative electricity found in all atoms and acting as the primary carrier of electricity in solids.
What is an electron.
300
Any of the gaseous elements- helium, neon, argon, krypton, xenon, and radon occupying group 0 (18) of the periodic table.
What is a noble gas.
400
a state or power of being reactive or the degree to which a thing is reactive.
What is Reactivity
400
A thing that is composed of two or more separate elements.
What is a compound
400
Having a consistency like that of water or oil, flowing freely but of constant volume.
What is liquid
400
A group of electrons revolving around the nucleus of an atom. A cloud like group of electrons.
What is an electron cloud.
400
The degree of compactness of a substance.
What is density.
500
a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure.
What is periodic table
500
A substance of matter with both definite and constant composition with distinct chemical properties.
What is a pure substance
500
An air like fluid substance which expands freely to fill any space available.
What is gas.
500
The central and most important part of an object, movement or group forming the basis for its activity and growth.
What is a nucleus.
500
A lingering quality impression or feeling attaching to something.