You can search for things like...

Neon
Poisson Ratio of Aluminum
Br (Symbol of Bromine)
26 (Atomic Number of Iron)
Lifetime of Praseodymium in s

Al

Aluminum

23 known isotopes (1 stable, 22 radioactive)

Show stable only

²¹Al

Mass

21.029082 u

Abundance

—

Half-life

35 nanoseconds

Spin/Parity

(5/2+)

Decay Mode(s)

Unknown

²²Al

Mass

22.019540 u

Abundance

—

Half-life

91.1 milliseconds

Spin/Parity

(4)+

Decay Mode(s)

EC/β⁺ (100%), β⁺p (55%), B+2P (1.1%)

²³Al

Mass

23.007244 u

Abundance

—

Half-life

446 milliseconds

Spin/Parity

5/2+

Decay Mode(s)

EC/β⁺ (100%), ECP (1.04%)

²⁴Al

Mass

23.999948 u

Abundance

—

Half-life

2.053 seconds

Spin/Parity

4+

Decay Mode(s)

EC/β⁺ (100%), ECA (0.035%), ECP (0.0016%)

²⁵Al

Mass

24.990428 u

Abundance

—

Half-life

7.183 seconds

Spin/Parity

5/2+

Decay Mode(s)

EC/β⁺ (100%)

²⁶Al

Mass

25.986892 u

Abundance

—

Half-life

7.17E+5 years

Spin/Parity

5+

Decay Mode(s)

EC/β⁺ (100%)

²⁷Al Stable

Mass

26.981538 u

Abundance

100.0000%

Half-life

Stable

Spin/Parity

5/2+

Decay Mode(s)

—

²⁸Al

Mass

27.981910 u

Abundance

—

Half-life

2.245 m

Spin/Parity

3+

Decay Mode(s)

β⁻ (100%)

²⁹Al

Mass

28.980453 u

Abundance

—

Half-life

6.56 m

Spin/Parity

5/2+

Decay Mode(s)

β⁻ (100%)

³⁰Al

Mass

29.982969 u

Abundance

—

Half-life

3.62 seconds

Spin/Parity

3+

Decay Mode(s)

β⁻ (100%)

³¹Al

Mass

30.983950 u

Abundance

—

Half-life

644 milliseconds

Spin/Parity

5/2(+)

Decay Mode(s)

β⁻ (100%), β⁻n (1.6%)

³²Al

Mass

31.988084 u

Abundance

—

Half-life

33.0 milliseconds

Spin/Parity

1+

Decay Mode(s)

β⁻ (100%), β⁻n (0.7%)

³³Al

Mass

32.990878 u

Abundance

—

Half-life

41.7 milliseconds

Spin/Parity

(5/2)+

Decay Mode(s)

β⁻ (100%), β⁻n (8.5%)

³⁴Al

Mass

33.996782 u

Abundance

—

Half-life

56.3 milliseconds

Spin/Parity

(4-)

Decay Mode(s)

β⁻ (100%), β⁻n (26%)

³⁵Al

Mass

34.999760 u

Abundance

—

Half-life

38.3 milliseconds

Spin/Parity

(5/2+)

Decay Mode(s)

β⁻ (100%), β⁻n (38%), β⁻2n (0%)

³⁶Al

Mass

36.006388 u

Abundance

—

Half-life

90 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%), β⁻n (31%)

³⁷Al

Mass

37.010531 u

Abundance

—

Half-life

10.7 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

³⁸Al

Mass

38.017681 u

Abundance

—

Half-life

9.0 milliseconds

Spin/Parity

(0-)

Decay Mode(s)

Unknown

³⁹Al

Mass

39.023070 u

Abundance

—

Half-life

7.6 milliseconds

Spin/Parity

(5/2+)

Decay Mode(s)

β⁻ (100%)

⁴⁰Al

Mass

40.030940 u

Abundance

—

Half-life

260 nanoseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

⁴¹Al

Mass

41.037134 u

Abundance

—

Half-life

Unknown

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

⁴²Al

Mass

42.045078 u

Abundance

—

Half-life

170 nanoseconds

Spin/Parity

—

Decay Mode(s)

Unknown

⁴³Al

Mass

43.051820 u

Abundance

—

Half-life

170 nanoseconds

Spin/Parity

—

Decay Mode(s)

Unknown

Decay mode abbreviations:

β⁻ = Beta minus decay, β⁺ = Beta plus decay, EC = Electron capture, α = Alpha decay

n = Neutron emission, p = Proton emission, SF = Spontaneous fission, IT = Isomeric transition

Conversions Print

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

1

2

3

4

5

6

7

N

Sy

Name

Atomic Mass

Series

Metals

Nonmetals