Chemistry: Unit 3 LTs 1 & 2

The nucleus of an atom contains which subatomic particles?

• protons and electrons

• protons and neutrons

• electrons and neutrons

• protons, electrons, and neutrons

Tags

NGSS.MS-PS1-1

^{What does the 6 represent above the C}

• Symbol 
• Name 
• Mass Number 
• Atomic Number 

Which subatomic particle is counted to determine the type of element the atom represents?

• proton

• neutron

• electron

• boron

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

Adding or subtracting neutrons (charge = 0, mass = 1) makes the element change into an...

• ion
• mixture
• isotope
• neutral atom

Which subatomic particles are said to have a relative mass of 1 amu?

• Proton

• Neutron

• Electron

• Quarks

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 the isotope of lithium have?

• 8
• 3
• 4
• 5

Tags

NGSS.MS-PS1-1

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

Tags

NGSS.HS-PS1-8

How many electrons does a sodium (Na) ion with a 1+ charge contain?

• 1

• 11

• 10

• 12