Parts of the atom

Parts of the atom quizizz notes

Complete these notes using the cornell style

I. What are the parts of the current (modern) model used today?

• 2 PARTS:

• NUCLEUS: the dense/solid CENTER part of an atom where most MASS is found.

• Contains PROTONS and NEUTRONS

I. What are the parts of the current (modern) model used today?

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

• Broken in to ENERGY LEVELS:  The DISTANCE an electron is away from the nucleus (specific ORBITALS can be found within each energy level).

• Electrons can change energy levels (gain energy=moving up; lose energy=down)

Multiple Select

Which particle(s) is/are found in the nucleus

• proton

• neutron

• electron

• all of them

3 Particles:

• 1. PROTON (p+) → POSITIVE charged particle, found in the NUCLEUS, that makes up at least HALF of the MASS of an atom!

• The number of p+ determines the TYPE of atom (they DON’T change)!

• 2. NEUTRON (n0) → NEUTRAL particle, found in the NUCLEUS, that makes up the rest of the mass of an atom.

• The number of n0 can CHANGE → ISOTOPE

• Act as the “glue” to keep the protons together (Nuclear force)

3 Particles

• 3. ELECTRON (e-) → NEGATIVE particle, found in the CLOUD, that has almost NO mass.

• The number of e- can CHANGE → makes charged atoms (IONS)

• Electrons exist in ENERGY LEVELS, have energy, and are responsible for CONNECTING atoms together (BOND)

Multiple Choice

Which sub-atomic particle is the "atomic glue" of the nucleus and has no charge?

• proton

• neutron

• electron

• ion

Multiple Choice

Which sub-atomic particle gives an atom its identity

• proton

• neutron

• electron

• isotope

II.  How do you know how many particles an atom has?

• Periodic Table contains boxes with information:

• 1. ATOMIC NUMBER:  tells you the number of PROTONS in an atom!

• Tells you:  Number of p+ AND the number of e-  (IF the atom isn’t charged)

II. (cont.) How do you know how many particles an atom has?

• II Mass Number:  the total number of protons and neutrons in an atom (p+  +   n0)

• Used to find the number of NEUTRONS → SUBTRACT mass number and atomic number!

• Mass number  - Atomic Number = n0 

• Remember → this CAN CHANGE (isotopes)
  
  

Multiple Choice

What is different about an isotope?

• It has a different amount of protons.

• It has a different amount of electrons.

• It has a different amount of neutrons.

• There is no difference with an isotope.

Fill in the Blanks

Atomic number ALWAYS tells us the number of ...