Name_____________________pd____
Name the sub atomic particles:
The atomic number is always equal to the
Atomic mass – atomic number =
Negative charge
Used to identify the element
Charged particles
Lost or gained when an ion is formed
Found in the nucleus
Compared to other subatomic particles, has very little mass
These vary for different isotopes of the same element
Mass equal to a proton
Positive charge
Make up most of the atom’s mass
No charge
Equal in neutral atoms
Found outside the nucleus
Give the number of
protons in Carbon
neutrons in C-14
electrons in Mg+2
atomic number of Rb
Rounded atomic mass of sodium
neutrons in sodium
protons in C-14
electrons in neutral U-235
neutrons in U-235
protons in O-2
electrons in O-2
neutrons in O-2
atomic number of O-2
atomic mass of O-2
electrons in Br-85-1
protons in Br-85-1
neutrons in Br-85-1
atomic number of Br-85-1
atomic mass of Br-85-1
An atom has 26 protons, 30 neutrons and and 24 electrons has the nuclear symbol _______and the hyphen notation _______. Is it an ion?
An ion with the symbol K+1 has how many protons, neutrons and electrons?
An ion with the symbol P-3 has how many protons, neutrons and electrons?
A piece of foil (density Al 2.7g/cc) has a mass of 54g. What is its volume? ________
Formula and Work:
If the foil is 350 cm long and 65 cm wide, how thick is it? _____________
Formula and work:
How many moles in the above foil?__________ How many atoms in the above foil?_________