Atomic Theory and Structure

Rutherford discovered the...

• electron
• proton
• neutron
• nucleus

Tags

NGSS.HS-PS1-8

an element will always have the same number of 

• neutrons
• protons
• isotopes
• atoms

Which particle does not contribute mass to the atom?

• Proton
• Neutron
• Electron
• Nucleus

An atom has 10 protons and a mass of 18. It has __ neutrons

• 10
• 18
• 28
• 8

Tags

NGSS.MS-PS1-1

An ______________ is the same element, with the same number of protons, but different numbers of neutrons

• Atom
• Isotope
• Atomic Number
• Mass Number

Tags

NGSS.HS-PS1-8

Where electrons are likely to be found as they travel around the nucleus

• Nucleus
• Electron Cloud
• Within a Proton
• Within a Neutron

Isotopes are elements with a different amount of

• protons
• neutrons
• electrons
• atoms

Tags

NGSS.HS-PS1-8

In a correctly written symbol what would be located in the "A" position?

• number of neutrons
• atomic number
• number of electrons 
• mass number

Tags

NGSS.HS-PS1-8

The mass number of an element that has18 protons, 18 electrons, and 19 neutrons is _____.

• 12.5
• 13
• 25
• 37

Tags

NGSS.MS-PS1-1

How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?

• 34
• 36
• 2
• 40

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2