Atoms

Match:

• Neutral charge

• Neutrons

• Small part. that make up pro & neut (6)

• Protons

• Positive charge

• Quarks

• Negative charge

• Electrons

Isotopes are atoms of the same element that has different numbers of ​ (a)   .

Example: B10 (Boron ​ (b)   )

• neutrons
• electrons
• protons
• 10
• 8

Tags

NGSS.HS-PS1-8

​ (a)   electrons are the electrons in the outermost shell, or energy level, of an atom.

• Valence
• Isotope

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Some exceptions to valence electrons are:

When there are an ____ number of valence electrons.

When there are ____valence electrons

When there are _____ valence electrons.

• odd

• too few

• too many

• even

Tags

NGSS.HS-PS1-1

​ (a)   : The sum of the number of protons and the number of neutrons in an atom.

​ (b)   : The number of protons in an atom.

​ (c)   : The average mass of an atom, taking into account all its naturally occurring isotopes.

• mass number
• atomic number
• atomic mass

Why is an atom mostly empty space?

Because atoms contain ​ (a)   with minimal mass.

Where is the mass of an atom located? 

The mass of the atom is located in the ​ (b)   .

• electrons
• protons
• neutrons
• nucleus
• electron cloud

Who were Proust, Dalton, Bohr, Thomson, & Rutherford?

• Discovered the electron

• Rutherford

• Proposed planetary model of the atom

• Bohr

• Discovered the atomic nucleus

• Thomson

• French chemist known for law of definite proportions

• Dalton

• Proposed modern atomic theory

• Proust

Who was James Chadwick?

• German mathematician who discovered the electron

• British physicist who discovered the neutron
• French biologist who discovered the proton

• American chemist who discovered the nucleus

Tags

NGSS.HS-PS1-8

Order the progression of the different models of the atom:

• Ernest Rutherford's Nuclear model

• J.J. Thomson's Plum Pudding model

• Dalton's Billiard Ball (Solid Sphere) Model

• Niels Bohr's Planetary model

• Erwin Schrodinger's Electron Cloud Model/Quantum Model THEN Wave mechanical model

What is a Bohr diagram?

• A simplified visual representation of an atom, showing the nucleus and the energy levels of the electrons.
• A visual representation of the periodic table
• A diagram used to represent the structure of a molecule
• A type of mathematical equation used to calculate the energy levels of electrons