a.3
What is a chemical property?
A chemical property describes the behaviour of a substance as it becomes a new substance.
What is Reaction with Acid?
Some substances react with acids while some do not.
Example: Mg reacts with acid, gold does not.
what is theory?
–Theory is a generalized explanation of a set of related observations or events supported by research and good arguments.
What is Subatomic Particles of Atom?
•Subatomic particles are the smaller particles that make up the atom.
who first organized the Periodic Table?
Dmitri Mendeleev was credited for organizing the first elements in 1867. Today that list is called the Periodic Table of Elements.
What is a chemical change?
A chemical change always results in the formation of a new substance or substances with different properties.
What is Reaction with Water?
– Some substance react with water while others do not.
Example: Potassium reacts when in contact with water, magnesium does not.
what is law?
Law is a generalized description of some aspect of the physical world under certain conditions
What is Protons?
–Protons
•Located in the nucleus.
•Has a positive charge.
•Letter “p” is used to identify it.
what is the periodic table?
•– a structured arrangement of elements that helps us to explain and predict physical and chemical properties.
What is a chemical reaction?
A Chemical reaction is a process in which a chemical change occurs.
what is atomic theory?
-A theory that explores the nature of matter by stating that matter is composed of discrete units called atoms.
what is neutrons?
•Located in the nucleus.
•Is neutral in charge, Zero.
•Letter “n” is used to identify it.
How to Identify a chemical reaction?
1.Colour Change will occur.
2.Gas will be given off
3.Heat or light will be given off
4.New substance will be formed, usually as a precipitate.
( precipitate is a solid that settles out at the bottom of your container)
what is the particle theory?
1.All matter is made up of tiny particles.
2.All the particles of one substance are the same. Different substances are made of different particles.
3.Particles are always moving the more energy they have the faster they move.
4.There are attraction forces between the particles. The closer they are the stronger the force.
what is Electrons?
•Located in the Cloud.
•Has a negative charge
•Letter “e” is used to identify it.
what is combustibility?
– If a substance is combustible or flammable it will burn when exposed to a flame.
Example: gasoline is flammable, water is not.