#1 Aleen (27)
Her blog is full of imformation and her explaination is very clear, she has done lots of research. Her answers were very detailed. One mistake she made was that for her drawing for sodium ion, the charge should be '+' instead of '1+'. Overall, i find it easy to understand her answers (: Nice blog(:

#2 Xueting (19)
Her answer is clear and she made an effort to use the compass to draw the elements and ions to make her work neat. She still provide extra information which allows me to recall my basic facts (: Nice blog too(:

#3 Wanling (16)
Her answer is easy to understand and she highlighted the key points that make me understand her explainations easier. I think one of the drawings for sulfide ion, the charges should be outside the shell. and it should be 'sulfide ion' instead of 'sulfur ion'? (: other than the answers, she also posted lots of videos, it is very nice! :P I enjoy reading her blog! (:








Ans 5) Sodium metal and sulfur is a non-metal... Why do we classify them in this way?








Ans 4) Chlorine-35 atom and Chlorine-37 atom are called isotopes... Use these two examples to explain what is 'isotopes'.

Defination of iostopes, different atoms of the same element which have the same number of protons but different number of electrons.

Chlorine-35 have a proton and neutron no. of 35.
Chlorine-37 have a proton and neutron no. of 37.
Both have the same number of 17 protons.
Chlorine-35 has 18 neutrons (35-17=18)
Chlorine-37 has 20 neutrons (37-17=20)

Therefore, Chlorine-35 and Chlorine-37 are isotopes.

Ans 3) Draw the atomic structure of a sulfur atom and a sulfide ion... Explain why you draw it in this way. Sulfur has a valency of 6. Sulfur needs to accept two electrons to achieve a full shell (2.8.8). When sulfur gains two electrons, sulfide ion is formed.

- I drew it myself.

Ans 2) Draw the atomic structure of a sodium atom and a sodium ion... Explain why you draw it this way.
Sodium has a valency of 1. Sodium needs to give away one electron to achieve a full shell (2.8). When sodium loses one electrons, an sodium ion is formed.

-I drew it myself.

Ans 1) What does an atom looks like? What are the sub-atomic particles inside it... (talk about electrons, neutrons, protons, electron shells, nucleus...)The atom is the smallest foundation unit or particle of an element that can exist. The sub-atomic particles are the Protons, Neutrons and Electrons.
The protons and neutrons are found in the nucleus of the atom. Electrons are found on the electron shells.
Protons, the number of protons in the nucleus of an atom is called the proton number or atomic number. Elements in the Periodic Table are arranges in order of their proton numbers.
Proton and Neutron both have a relative mass of 1, whereas Electron has a relative mass of 1/1840. Proton '+', Electron '-'
Proton have a relative charge of +1, Neutron 0, Electron -1. The first shell can hold up to 2 shells, second shell 8, third shell 8, forth shell 18.

-I drew it myself.

Qn 1) What does an atom looks like? What are the sub-atomic particles inside it... (talk about electrons, neutrons, protons, electron shells, nucleus...)

Qn 2) Draw the atomic structure of a sodium atom and a sodium ion... Explain why you draw it this way.

Qn 3) Draw the atomic structure of a sulfur atom and a sulfide ion... Explain why you draw it this way.

Qn 4) Chlorine-35 atom and Chlorine-37 atom are called isotopes... Use these two examples to explain what is 'isotopes'.

Qn 5) Sodium is a metal and sulfur is a non-metal... Why do we classify them in this way?

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