Atomic Structure and Law of Conservation

Which of the following states that matter is not created or destroyed in a chemical reaction?

• Law of Multiple Proportions
• Law of Definite Proportions
• Law of Conservation of Mass

Tags

NGSS.HS-PS1-7

Whose model of the atom is pictured here?

• Bohr
• Thomson
• Rutherford
• Schrodinger

Whose model of the atom is pictured here?

• Bohr
• Rutherford
• Thomson
• Schrodinger

Scientists are constantly refining theories, so they change over time.

• True
• False

What is an ion?

• A neutral atom
• An atom with a different number of electrons
• An atom with a different number of neutrons
• An atom with a different number of protons

What is an isotope?

• A neutral atom
• An atom with a different number of protons
• An atom with a different number of neutrons
• An atom with a different number of electrons

Tags

NGSS.HS-PS1-8

An atom's mass number = 

• # protons + # neutrons
• # protons + # electrons
• # neutrons + # electrons
• # protons only

Tags

NGSS.HS-PS1-8

An atom's atomic number = 

• # protons + # neutrons
• # protons only
• # neutrons only
• # electrons only

How many electrons is an an oxygen atom if it's atomic number is 8 and its charge is -2?

• 6
• 8
• 10
• 12

How many neutrons are in an isotope of carbon if its atomic number is 6 and its mass number is 14?

• 6
• 8
• 20