Structure of an Atom

The first energy level can hold up to how many electrons?

• 8
• 4
• 2
• 5

Tags

NGSS.MS-PS1-1

J.J. Thomson provided evidence that an atom...

• is the smallest particle of matter
• contains negatively charged particles
• has an overall negative charge
• has an overall positive charge

True or False: The majority of an atom is made up of empty space

• True
• False

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

the central region of an atom where most of the atom's mass can be found

• nucleus

• electron cloud

• core

• center

How can a student use the atomic number and the mass number of an atom to calculate the number of neutrons in the atom?

• Number of neutrons = mass number - atomic number

• Number of neutrons = atomic number - mass number

• Number of neutrons = atomic number + mass number

• Number of neutrons = mass number + atomic number

an element will always have the same number of 

• neutrons
• protons
• isotopes
• atoms

Rutherford discovered the...

• electron
• proton
• neutron
• nucleus

Tags

NGSS.HS-PS1-8

How many neutrons does this atom have?

• 2.5

• 6

• 5

• 10.811

Tags

NGSS.MS-PS1-1

What is atomic mass?

• Protons + neutrons

• Protons + electrons

• Neutrons + electrons

• Neutrons + quarks