Atomic theory

Which particle carries a negative charge?

• Electron
• Neutron
• Proton

Which particle carries a positive charge?

• Electron
• Neutron
• Proton

With the gold foil experiment, Rutherford concluded that...

• atoms were mostly empty space

• atoms contained no charged particles

• electrons were in the nucleus

• protons were in orbitals

Which 2 particles have about the same mass and contribute the entire mass of the atom?

• protons & neutrons

• neutrons and electrons

• protons and electrons

Tags

NGSS.MS-PS1-1

If an atom becomes NEGATIVELY charged, what has happened?

• gains an electron
• gains a proton
• loses an electron
• loses a proton

Tags

NGSS.HS-PS1-1

Isotopes of the same element contain the same number of protons but different number of...

• neutrons
• electrons
• both
• neither

An element's ATOMIC NUMBER tells you how many ____________ it has.

• protons
• electrons
• neutrons

An ion with a +1 charge tells you that it has...

• more protons
• more electrons
• more neutrons

Tags

NGSS.MS-PS1-1

calculate the proton number of Se^-2

• 79

• 34

• 45

• 111

Tags

NGSS.HS-PS1-1

calculate the electron number of Se^-2

• 32
• 34
• 77
• 36

Tags

NGSS.HS-PS1-1