Chem 170 chapter 2 Flashcards
1
Q
Which idea came out of Rutherfords gold foil experiment?
A
That Atoms are filled with mostly empty space
2
Q
Determine the number of electrons in Cr+3
A
21
3
Q
What is the charge of the ion most commonly formed by S?
A
2-
4
Q
Find the atomic mass of an element with 2 isotopes
The first has a mass of 68.925 and an abundance of 60.11%
The second has a mass of 70.9247
A
69.72amu
5
Q
Which sample contains the greatest # of atoms? 14g C 49g Cr 102 g Ag 202g Pb
A
14g C
6
Q
Determine the # of atoms in 1.85mL of mercury (density = 13.5 g/mL)
A
7.50 x 10^22 atoms
