Unit 3 Atomic Structure

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20
• 10
• 5
• 25

Tags

NGSS.MS-PS1-1

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

Tags

NGSS.MS-PS1-1

The particles of the atom you can find by knowing the atomic number.

• neutrons
• protons and electrons
• protons and neutrons
• atomic mass

Tags

NGSS.MS-PS1-1

Which scientist discovered the electron, which helped him develop a model of the atom?

• Niels Bohr
• John Dalton
• Ernst Rutherford
• J.J Thompson

What is an atom mostly made up of?

• protons
• electrons
• empty space
• neutrons

Tags

NGSS.MS-PS1-1

Which subatomic particle has a negative (-) charge?

• Proton
• Electron
• Neutron

The subatomic particle that determines the identity of an element.

• neutron
• proton
• electron
• outer shell

Elements on the periodic table increase by...

• atomic mass
• size
• mass number
• atomic #

Tags

NGSS.HS-PS1-2

Most of the mass of an atom is contained here.

• electron orbitals 
• nucleus
• shells
• atomic #

Tags

NGSS.HS-PS1-8