Atomic Structure Review

True or False - Protons and Neutrons have about the same mass.

• True - They have about the same mass

• False - They do not have about the same mass

What is an atom mostly made up of?

• protons
• electrons
• empty space
• neutrons

Tags

NGSS.MS-PS1-1

The subatomic particle that determines the identity of an element.

• neutron
• proton
• electron
• outer shell

What charge does the nucleus have and why?

• positive - the neutrons do not have a charge
• positive - the neutrons and protons are positively charged particles
• neutral - the neutral charge dominates the positive charge
• neutral - electrons cancel out the positive charge of the atom

Tags

NGSS.MS-PS1-1

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

• 20
• 10
• 5
• 25

Tags

NGSS.MS-PS1-1

Most of the mass of an atom is contained here.

• electron orbitals 
• nucleus
• shells
• atomic #

Tags

NGSS.HS-PS1-8

What is the difference between the atomic mass and the mass number?

• the atomic mass is always a whole number
• the atomic mass equals the atomic #
• mass number is the rounded atomic mass - always a whole number
• electrons

which atom has  4 neutrons?

• Li-6
• Li-7
• Li-8
• they have the same # of neutrons

Tags

NGSS.MS-PS1-1

which explanation of this notation is correct?

•  12 is proton #
• 6 tells you there are 6 neutrons
• 6 tells you there are 6 protons
• 12 is not a mass # here

Tags

NGSS.MS-PS1-1

How many neutrons does Manganese - 55 have?

• 30
• 55
• 25
• 54