Element and atom

Element:a substancesthat cannot be broken down any further into anything simpler.


Atom:the smallest particle of an element that has the same chemical properties as the element.


Nucleus:an atom´s dense center, wheremost og its mass is.
Electron: a negatively charged particle that moves around an atom´´s nucleus.
Proton: a positively changed particle inside an atom´s nuecleus.
Neutron:a particle with no charged inside an atom´s nucleus.


Atomic numbers: the number of protons in an atom.


Metal:any of a group of element that conduct heat and electricity, is shine and bendable.

Physical properties

Matter:any solid liquid or gas.


Mass:amount of matter inan object.


Volume:the amount of space and object takes up.


Density:the amount of mass in a certain volume of material.


Physical Properties:a property that can be observed without changing the identify of a substances.


Physical Change:a change in size, shape, or state withoutforming a new substance.


Solution:a mixture of one substance dissolved in another so the properties are the same throughout.


Chemicl Change:a change in matter that produces a new substances with different properties from the original.