1. ethyl bromide
2. n-propyl bromide
3. methyl bromide
4. n-butyl bromide
n-butyl bromide
1. benzene
2. toluene
3. ethyl benzene
4. n-propyl benzene
toluene
1. nucleas
2. electron
3. proton
4. neutron
nucleas
1. CO2
2. NF3
3. BCl3
4. CCl4
NF<sub>3</sub>
1. 0.053 nm
2. 0.016 nm
3. 0.212 nm
4. 0.0265 nm
0.212 nm
1. isomers
2. isotopes
3. isotones
4. isobars
isotones
1. X=2 0n1,Y = 2α4
2. X= α,Y=2e
3. X=2e,= α
4. X= α,Y=2n
X=2e,= α
1. Na>Mg>Be
2. Mg>Na>Be
3. Be>Na>Mg
4. Be>Mg>Na
Na>Mg>Be
1. iron
2. manganese
3. cobalt
4. nickel
manganese
1. Alfred Nobel
2. Enrico Fermi
3. Dimitri Mendeleef
4. Albert Einstein
Albert Einstein