States of Matter
what are the 3 states of matter?
solid, liquid and gas
What is a chemical change?
Chemical change is non-reversible and a new substance is formed,
What is matter?
Matter is anything that takes up space and has mass(weight.)
What is the definition of an atom?
The smallest chemical unit of matter.
What is the atomic mass of Hydrogen?
1
When a solid changes to a liquid what is it called?
melting
What change can be reversible?
Physical change
What is matter made up of?
Tiny particles called atoms.
What is the definition of a molecule?
Two or more atoms linked together to make a substance with unique properties.
What is the number of protons in Carbon?
6
When a liquid changes into a gas what is it called?
Evaporation
Is cooking an egg a physical change or chemical change?
Chemical change
The amount of space that matter occupies is called...
Volume
What is a compound?
substance made of billions and billions of molecules
Name one nonmetal element.
Answers will vary
The molecules in a solid are….
solid are tightly packed
What is the difference between chemical change and physical change?
In a physical change it can be reversible but in a chemical change it is non-reversible.
A state of matter that can spread out to fill the whole space is
1.liquid
2.gas
3.solid
2.gas
What is an element?
A substance made of billions and billions of the same atom.
What is the atomic number of Helium?
2
In liquids are the atoms moving quickly or are they moving slowly?
They are moving slowly.
Is cutting paper a physical or chemical change?
Physical
Mass and volume are physical properties of
1.motion
2.temperature
3.matter
4.nergy
3.Matter
Give one real-life example of an element.
Iron, Gold, Hydrogen, etc....
What is the atomic number of Iron?
26