Chemistry - Atoms & Isotopes Review

What is the atomic number of Neon, Ne?

• 10
• 20.1798
• 10.1798
• 7

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NGSS.HS-PS1-1

A neutral atom of the isotope ²⁶₁₂Mg would consist of

• 12 protons, 26 neutrons, 26 electrons
• 26 protons, 12 neutrons, 26 electrons
• 26 protons, 14 neutrons, 14 electrons
• 12 protons, 14 neutrons, 12 electrons

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NGSS.MS-PS1-1

An atom is electrically neutral when

• protons and neutrons are the same
• protons and electrons are the same
• neutrons and electrons are the same
• neutrons balance the protons and electrons

Isotopes of the same element have the same number of 

• protons
• neutrons
• electrons
• not enough information

Iron-60 (atomic number 26) is an isotope that is often used to study meteorites.  How many neutrons does iron-60 have?

• 26
• 60
• 34
• 86

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NGSS.HS-PS1-8

Who was the first person to publish a theory about the existence of atoms?

• John Dalton
• JJ Thomson
• Earnest Rutherford
• Erwin Schrodinger

Tags

NGSS.MS-PS1-1

Which scientist is credited with discovering the electron?

• John Dalton
• JJ Thomson
• Ernest Rutherford
• Werner Heisenberg

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NGSS.MS-PS2-3

What did Ernest Rutherford discover when he shot particles at gold foil?

• Electrons
• Protons
• Neutrons
• A tiny, dense, positively charged nucleus 

What two particles are part of the nucleus of an atom?

• Protons and Electrons
• Electrons and Neutrons
• Protons and Neutrons
• Alpha and Beta

Tags

NGSS.MS-PS1-1

When you add the number of protons and neutrons together, you are calculating...

• Atomic Number
• Atomic Mass
• Mass Number
• Pythagorean's Theorem