Numbers to Know

Question 1

Planck’s constant

Answer 1

6.626 x 10^-34

Question 1

1 eV = ? J

Answer 1

1.602 x 10^-19 J

Question 2

Electron charge

Answer 2

1.602 x 10^-19 C

Question 3

Avogadro’s number

Answer 3

6.022 x 10^23 atoms/mol

Question 4

1 Ci = ? Bq

Answer 4

3.7 x 10^10 Bq

Question 5

1 mCi = ? MBq

Answer 5

37 MBq

Question 6

1 amu = ? MeV

Answer 6

931 MeV
1.66 x 10^-27 kg

Question 7

Proton rest mass

Answer 7

938 MeV

Question 8

1 Angstrom = ? m

Answer 8

1 x 10^-10 m
0.1 nm

Question 9

E = ? / lambda (nm and Anstroms)

Answer 9

E = 1.24 / lambda (nm)
E = 12.4 / lambda (A)