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