What are the different types of JC Chemistry tuition classes available at your centre?

We have 3 modes of learning for students to choose from: weekly physical classes at Bishan; weekly online lessons via Zoom; and on-demand video lessons.

Are you the only Chemistry tutor conducting the classes or do you engage other tutors to do that?

Please be rest assured that I conduct all my classes personally and I do not engage other tutors to teach at my centre.

How well do your students perform after attending your H2 Chemistry tuition classes?

Most of my students showed improvements by at least 3 grades and more than 80% have attained distinction for A Levels. The earlier the students join my classes, the more confident I am in improving their grades.

What is your class size at Bishan?

Usually the class size is around 10 to 12 students. Max class size is 16 pax.

Is there makeup lesson if I miss a class?

Yes makeup lesson is available in the same week subject to availability. If makeup class is not possible, the student can view the recorded video lessons at Google Classroom.

Do you have trial lesson available? How much is it?

Yes we do. Fees for trial lesson are for Bishan class and for Zoom online class.

Does your centre offer O Level chemistry tuition? Do you teach IB / IP chemistry tuition? How about H1 Chemistry?

Chemistry Guru specialises in H2 Chemistry for JC1 and JC2 or IP Year 5 and IP Year 6 students only. Find out all the information about A Level H2 Chemistry and the detailed comparison between H1 and H2 Chemistry. We do not conduct lessons for H1 Chemistry, O Level Chemistry, IB Chemistry or IP Chemistry at IP Year 3 and IP Year 4.

2021 P1 Q30 - Compare Properties between s-block and Transition Metals

Let Chemistry Guru, Singapore's esteemed A Level Chemistry tuition centre, guide you through our final question for 2021 A Levels H2 Chemistry Paper 1 Question 30.

2021 p1 q30 question

We are required to deduce which properties of rhenium are typical of a transition element.

Let's compare the melting point and density between s-block metal and transition metal.

2021 p1 q30 compare properties

1. Melting Point

Transition metals have higher melting points as they can delocalise electrons from s-subshell and d-subshell.

They will form more positively charged cations attracting a bigger sea of delocalised electrons, metallic bonds are stronger hence higher melting point than s-block metal like calcium.

Rhenium with high melting point of 3180^oC is typical of a transition element.

2. Density

Transition metals have higher density since they have bigger mass number and smaller radii.

This means the transition metal atoms are more closely packed per unit volume which contributes to their higher density as compared to s-block metals.

Rhenium with high density of 21 020 kg m^-3 is typical of a transition element.

Therefore the answer to this question is option D (both properties 1 and 2).

2021 p1 q30 answer