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.

2020 P1 Q1 - Deducing number of d-orbitals with 4 lobes

Let Chemistry Guru, Singapore's renowned JC Chemistry tuition centre, guide you through 2020 A Levels H2 Chemistry Paper 1 Question 1.

2020 p1 q1 question

We are required to determine the number of 3d orbitals that has four lobes.

Let's recap the shape of p orbitals and d orbitals.

2020 p1 q1 p orbitals

There are 3 p orbitals in each p subshell.

p orbitals are dumbbell shaped with 2 lobes.
- 2p_x lies along x axis
- 2p_y lies along y axis
- 2p_z lies along z axis

2020 p1 q1 d orbitals

There are 5 d orbitals in each d subshell.

4 of the d orbitals are clover-leaf shaped with 4 lobes.
- 3d_xy lies on xy plane
- 3d_yz lies on yz plane
- 3d_xz lies on xz plane
- 3d_x²-y² lies directly along x and y axis

The final d orbital 3d_z² is dumbbell shaped with a ring around the centre lying along z axis.

2020 p1 q1 answer