Periodic Table Practice/ Test review

number of electrons in Beryllium (Be)

number of protons in NItrogen (N)

Symbol for Chlorine

• Cl

• CL

• C

• cl

number of neutrons in Lead (Pb)

What part of the element block do you look at to find the number of electrons?

• atomic number

• atomic mass

• atomic symbol

• atomic mass - atomic number

What part of the element block do you look at to find the number of protons?

• atomic number

• atomic mass

• atomic symbol

• atomic mass - atomic number

How do you find the number of neutrons in an atom?

• atomic number

• atomic mass

• atomic symbol

• atomic mass - atomic number

How many neutrons does the an element with an atomic number of 3 and a mass of 6.9 contain?

• 6.9
• 4
• 3
• 7

How many neutrons does oxygen have?

Do you round the atomic mass?

• Yes, always round the mass

• No, never round the mass

• Depends on which element

• Only round if the number increases