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i don't know the ANS for #2

回momo :

equation 3 既right hand side 既neutron 數目係咪有d問題 ?

### 1 Answer

- momoLv 61 decade agoFavorite Answer
The question 2 answer is B (2 only)

For equation 1,

Boron 10 (with 5 neutrons and 5 proton) + 1 neutron = 6 neutrons + 5 proton

alpha particle has 2 neutrons + 2 proton

Lithium 6 has 3 neutrons + 3 protons

Left hand side has 6 neutrons + 5 protons

Right hand side has 5 neutrons + 5 protons

The equation on both sides are unbalanced.

For equation 2,

Bi 210 has 127 neutrons + 83 protons

Po 210 has 126 neutrons + 84 protons

beta particle = 1 electron

1 electron + 1proton = 1 neutron

Left hand side 127 neutrons + 83 protons

Right hand side 127 neutrons + 83 protons

The equation on both sides are balanced

For equation 3,

Nitrogen 14 has 7 neutrons + 7 protons

Oxygen 17 has 9 neutrons + 8 protons

alpha particle has 2 neutrons + 2 protons

Left hand side has 9 neutrons + 9 neutrons

Right hand side has 10 neutrons + 9 protons

The equation on both sides are unbalanced

The answer is B (2 only)

2008-12-31 19:11:20 補充：

Sorry for counting error

For equation 3,

The right hand side has 9 neutrons + 9 protons.

The equation on both sides are balanced.

The answer is D ( 2 and 3 only)