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Atom Smallest part of any element that contains all properties of that element.
The center of an atom. It contains two particles: neutron and protonThe center of an atom. It contains two particles: neutron and proton. Has a positive charge. Nucleus
3 main subatomic particles are the proton, neutron and electron.THESE particles are SMALLER than an atom. ***LOOK at the difference in size!!! WOW…an electron is SO SMALL!!!
Positively charged particle found in the nucleus.Proton
Neutron Particle in the nucleus of an atom that does not have a charge. It is a neutral particle.
Particle orbiting the nucleus of an atom. It has a negative charge.Electron
Valence Electrons – the electrons in the outermost energy level/shell of an atom; they determine how an element will react with other substances.
represents the number of protons found in the atom’s nucleus.
Protons + Neutrons=Mass NumberThe sum of the number of protons and neutrons found in the nucleus of the atom for that element. Protons + Neutrons=Mass Number
Atomic Number 6 C Carbon 12.011 Symbol Element Name Atomic Mass
This is what gives the atom a neutral charge.Number of Protons Equals Number of electrons This is what gives the atom a neutral charge.
The average mass of one atom of an element.ATOMIC MASS The average mass of one atom of an element.
(atomic mass unit)- the SI unit for the masses of particles in an atom.
The Big Picture!
Neutron Proton Electron
How many neutrons does an atom contain if its atomic mass is 65 and it contains 30 protons?
Protons + Neutrons ? =
Protons + Neutrons Mass Number =
What is the smallest part of any element that contains all properties of that element?Atom
What are the particles that are smaller than an atom called?Subatomic Particles
What are the 3 main subatomic particles that make up an atom?Proton Neutron Electron
What is the center of an atom called?Nucleus
What are the two particles found in the nucleus of an atom?Proton and Neutron
What type of charge does the nucleus of an atom have?Positive
What is the positively charged particle found in the nucleus?Proton
The subatomic particle that is neutral is theNeutron
What is the negative charged particle that orbits the nucleus of an atom?Electron
Why does the atom have a neutral charge?The number of protons in the nucleus of an atom equals the number of electrons orbiting the nucleus.
How do we determine the number of electrons in an atom?Number of electrons equals the number of protons.
17 The element chlorine has an atomic number of 17, it has_____ protons in its nucleus. 17
Mass Number Practice
How many protons does an atom have if its atomic mass is 12 and it has 6 neutrons?
What is the mass number if an atom has 2 protons and 2 neutrons?
Which element has an mass number of 12 and contains 6 neutrons?
Structure of an Atom.
Inside an Atom.
Atoms Matter Lecture #2. I. Structure of the Atom A. There are 3 main parts the the atom (subatomic particles) 1. Proton (+): has a positive charge and.
Atomic Structure Nucleus – contains protons and neutrons
Structure of an Atom. What Is an Atom? An atom is often referred to as the building block of matter. Atoms have a nucleus surrounded by an electron cloud.
Atomic Mass & Number Isotopes The Periodic Table.
The Periodic Table. Define the following terms. 1. proton 2. neutron 3. electron 4. nucleus.
Subatomic Particles and Isotopes. Subatomic Particles Protons- Positively Charged Protons- Positively Charged Located in the nucleus Located in the nucleus.
Atoms 8.5A The student is expected to describe the structure of atoms, including the masses, electrical charges, and locations, of protons and neutrons.
Explaining the Periodic Table (6.7) If elements are the building blocks of all other matter, what are they made of? There are three particles that make.
The atoms of all elements are made up of a central nucleus with orbiting electrons. ◦ A nucleus is made up of positively charged PROTONS and neutral.
Atomic Structure and the Periodic Table
Atomic Structure I. Subatomic Particles.
Mass Number Atomic Number equals the # of... NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM.
Subatomic particles Electron Proton Neutron NameSymbolCharge Relative mass Actual mass (g) e-e- p+p+ n0n / x x
STRUCTURE OF THE ATOM.
Atomic Structure lecture 4.1. Atomic structure Small, dense nucleus Protons: (+) charge Neutrons : (0) no charge Electrons: (-) charge # Protons = # electrons.
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