Parts of an atom

Parts of an atom

What does an atom look like?

KEY WORDS:

Atom

Neutrons

Element

Atomic Number

Electron

Atomic Mass

Nucleus

Proton



What is an atom?

• smallest possible unit into which matter can be divivided, while still maintaining its properties.

Open Ended

What is matter?

Open Ended

What is an element?

Element

An element is a substance that cannot be broken down into any other substance. Everything in the universe contains the atoms of at least one or more elements. All elements are found on the periodic table.

What are the parts of the current model of the atom?

• NUCLEUS: the dense/solid center part of an atom where most mass is found; contains the protons and the neutrons

• ELECTRON CLOUD: mostly empty space surrounding nucleus where electrons are found

Multiple Select

What particle(s) are found in the nucleus?

• electrons

• protons

• neutrons

• all of the above

PROTONS

• Positively charged particle

• Found in the nucleus

• Equal to the atomic number on the periodic table

• Contributes to mass of the atom

• Equal to the number of electrons in a neutral atom

Open Ended

What is the charge of an proton?

NEUTRONS

• Neutral particle

• No charge

• Found in the nucleus

• Contributes to the mass of the atom

• Atoms can have different number of neutrons

Open Ended

Where can neutrons be found?

ELECTRONS

• Negatively charged particle

• Found outside the nucleus of the atom in the electron orbits/level

• Levels hold a maximum number of 2, 8, 8, 18

• Move so rapidly around the nucleus that they create an electron cloud

• mass is insignificant 1/1836

• Equal to protons in a neutral atom

• Involved in the formation of chemical bonds

Open Ended

What is the charge of an electron?

Calculations

Atomic number = protons

Atomic number = electrons in neutral atom

Neutrons = atomic mass - atomic number or protons

(when finding neutrons round the atomic mass to a whole number)

Mass number = protons + neutrons