Sci ch3 Term
A molecule is the Particle of a substance that has the same Properties as the substance
Tiny
How do Scientist use models?
To explain things they can not see.
How are table salt and water alike? How are they different?
Alike- both compounds. Diff- Salt=sodium +chlorine
A (n) Is the building block of matter
Atom
Explain what an atomic number and a mass number are.
Atomic number is the number of protons in each atom of an element. The mass number is equal to the number of protons and the number of electrons.
A substance formed when atoms of two or knee elements Join together is a (n)
Compound
A tiny particle of an atom that moves around The nucleus is the
Electron
A (n) is matter that has only one kind of atom
Element
Matter made of one kind of atom that is found in nature is a
Natural element
A tiny particle in the nucleus of an atom that is About the same size as a proton is a (n)
Neutron
The central part of an atom is called the
Nucleus
A very hot gas with an electric charge is
Plasma
Describe the part of the atom
Protons- positively charged particles. Neutrons- particles with no charge. Nucleus- contains protons and neutrons. Electrons- negatively charged particle, move around the nucleus
The form- liquid, solid, gas- that matter has is the
State of matter
Atomic number
#protons and# electrons
Aluminum- Number of protons
13
Number of electrons (Aluminum
13
Radium Number of Neutrons
138
Number of Neutrons( Aluminum
14
Radium Number of Electrons
88
Radium. Number of protons
88
Atomic mass
= Protons plus neurons
Water
= hydrogen @ oxygen