Atomic structure
AC1.1
1. Produce a table showing each sub-atomic particle with their relative masses and charges (Bbc.co.uk 2015).
Particle Relative Charge Relative Mass
Proton +1 1
Neutron 0 1
Electron -1
2. Explain the meaning of the terms, ATOMIC NUMBER and MASS NUMBER of an atom in terms of sub atomic particles.
The atomic number refers to the number of protons in an atom, the mass number refers to the number of protons plus the number of neutrons (Bbc.co.uk 2015).
3. A neutral atom contains the same number of protons and electrons. Briefly explain why.
If an atom is to be positively charged, it has to have more protons, conversely, if it is to be negatively charged it will have more electrons, so for an atom to be …show more content…
2nd step) Beneath each symbol, write its valency.
3rd step) Swap the valencies over.
4th step) If the valencies can be simplified, divide them both by the smaller of the two numbers. If one of the numbers is already one, then they cannot be divided and simplified any further.
5th step) Write the formula.
11. The table below compares some properties of chlorine with bromine
element Cl Br group 7 7 atomic number 17 36 atomic radius / pm 102 124
(i) Why do chlorine and bromine have different atomic
AC1.1
1. Produce a table showing each sub-atomic particle with their relative masses and charges (Bbc.co.uk 2015).
Particle Relative Charge Relative Mass
Proton +1 1
Neutron 0 1
Electron -1
2. Explain the meaning of the terms, ATOMIC NUMBER and MASS NUMBER of an atom in terms of sub atomic particles.
The atomic number refers to the number of protons in an atom, the mass number refers to the number of protons plus the number of neutrons (Bbc.co.uk 2015).
3. A neutral atom contains the same number of protons and electrons. Briefly explain why.
If an atom is to be positively charged, it has to have more protons, conversely, if it is to be negatively charged it will have more electrons, so for an atom to be …show more content…
2nd step) Beneath each symbol, write its valency.
3rd step) Swap the valencies over.
4th step) If the valencies can be simplified, divide them both by the smaller of the two numbers. If one of the numbers is already one, then they cannot be divided and simplified any further.
5th step) Write the formula.
11. The table below compares some properties of chlorine with bromine
element Cl Br group 7 7 atomic number 17 36 atomic radius / pm 102 124
(i) Why do chlorine and bromine have different atomic