The noble gases are left out of the trends in atomic radii because there is great debate over the experimental values of their atomic radii.

The SI units for measuring atomic radii are the nanometer (nm) and the picometer (pm). 1 nm = 1 X 109 m; 1 pm = 1 X 10-12 m.

TLS Online TPP Program

#Id: 4498

#Unit 13. Methods in Biology

To record limb lead III, the negative terminal of the electrocardiograph is connected to the left arm and the positive terminal is connected to the left leg.

TLS Online TPP Program

#Id: 4499

#Unit 13. Methods in Biology

Einthoven’s Law

Lead I potential Lead III potential + = Lead II potential

TLS Online TPP Program

#Id: 4500

#Unit 13. Methods in Biology

Three unipolar limb leads (Augmented limb leads):

VR (right arm), VL (left arm) and VF (left foot).

TLS Online TPP Program

#Id: 4501

#Unit 13. Methods in Biology

In augmented unipolar limb lead, two of the limbs are connected through the negative terminal of the electrocardiograph, and the third limb is connected to the positive terminal.

TLS Online TPP Program

#Id: 4502

#Unit 13. Methods in Biology

When the positive terminal is on the right arm, the lead is known as the aVR lead.

TLS Online TPP Program

#Id: 4503

#Unit 13. Methods in Biology

When the positive terminal is on the left arm, the lead is known as the aVL lead.