Atomic Structure and Matter

In order to find the number of neutrons you must ___________.

• just use the atomic mass
• just use the atomic number
• subtract atomic number from atomic mass
• its the same as electrons

The atomic mass 44.96 will round to ____.

• 44
• 45
• 43
• 50

The atomic mass 20.18 will round to ____.

• 20
• 21
• 28
• 2

For an atom, the number of protons is always the same as the number of ______.

• Neutrons
• Electrons
• Nucleus
• Quarks

The mass of an atom is determined by the _____.

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

The protons and neutrons are located in the 

• nucleus
• electron cloud
• both nucleus and electron cloud
• orbitals

The 2 particles that are the same size are ____.

• protons and electrons
• protons and neutrons
• neutrons and electrons
• they are all the same size

The atomic number gives you the number of _____.

• protons
• neutrons
• electrons
• orbitals

What is the mass number of this atom?

• 1
• 3
• 4
• 7

Tags

NGSS.MS-PS1-1

How many protons are in an atom of magnesium?

• 3
• 12
• 24
• 40