For an atom to have an overall negative charge
electrons were gained
electrons were lost
The atomic mass of an element is the weighted average of the masses of all its ______ that occur naturally
isotopes
neutrons
electrons
protons
How many neutrons does the isotope of lithium-8 have?
5
How many neutrons in C-14?
8
In uranium - 235 what does 235 represent?
mass number
What do these isotopes of carbon all have in common?
neutrons and mass number
atomic number and electrons
protons, atomic number, and mass number
atomic number and neutrons
How do you calculate mass number?
protons + neutrons
How many neutrons does an atom of the isotope Neon-22 have?
12
The atomic number represents the number of...
electrons
ions
neutrons
protons
How many protons does Calcium have?
20
If Arsenic has a charge of -3, then how many electrons does it have?
36