Atomic Structure: Atoms, Isotopes & Ions...Oh, My!

How many particles are in the nucleus of an atom of fluorine-19?

• 9 protons, 10 neutrons, 9 electrons
• 9 protons, 9 neutrons
• 9 protons, 10 neutrons
• 19 protons, 19 neutrons

Tags

NGSS.HS-PS1-8

Carbon-13 differs from carbon-12 by:

• 1 extra neutron
• 1 less neutron
• 1 extra proton
• 1 extra electron

Tags

NGSS.MS-PS1-1

How many electrons does a copper (II) ion (Cu⁺²) contain?

• 31 electrons

• 29 electrons

• 27 electrons

• 36 electrons

Tags

NGSS.MS-PS1-1

Which particle determines an atom's identity?

• Proton
• Neutron
• Electron
• Positron

The atomic number is always equal to the number of:

• neutrons.
• protons and electrons.
• protons.
• particles in the nucleus.

How many neutrons are in the isotope potassium-40?

• 19
• 40
• 20
• 21

Tags

NGSS.HS-PS1-8

How many electrons does an oxide ion (O^-2) contain?

• 2

• 6

• 8

• 10

Tags

NGSS.MS-PS1-1

An ion is found to have 26 protons and 23 electrons.  What is the correct symbol for this ion?

• Fe⁺³
• Fe^-3
• V⁺³
• V^-3

Tags

NGSS.HS-PS1-1

An atom is found to have 11 neutrons and 10 protons.  What is the identity of the atom?

• neon-20
• neon-21
• sodium-21
• sodium-23

Tags

NGSS.MS-PS1-1

Which subatomic particle determines the chemical behavior of an atom?

• proton
• neutron
• electron
• nucleon

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2