A molecule has a central atom and three identical bonds to other atoms, with no lone pairs. The shape of this molecule is ________.

Hydrogen bonds are a major factor in the structure of ________.

Potassium has ________ valence electron(s).

Which is the most polar bond in the following list?

Iodine is a metal.

One of the principles of geriatric assessment is that:

The shape of an s electron level is ________.

If the electronegativity difference between elements X and Y is 2.1, the bond between the elements X-Y is ________.

An 80-year-old woman comes to the urgent care center because she slipped on wet steps yesterday while watering her plants. She scraped her leg but did not hit her head and this is her 3rd fall this year. Her last fall was 3 months ago and she went to the ED because she hit her head on her bathroom vanity. Non-contrast CT of the head showed nonspecific microvascular ischemic changes and no acute bleeding. She has a history of hypertension, well controlled Type 2 diabetes and atrial fibrillation. She takes lisinopril, carvedilol, metformin and warfarin daily. On examination, her blood pressure 132/86 mmHg (no postural changes), heart rate 80 bpm and irregularly irregular. Her neurologic rindings are normal. She has a superficial abrasion with surrounding ecchymoses on the posterior surface of her right leg but no other injuries. She walks slowly with a shortened stride length on a slightly wide base. Her INR is 3.0. Which of the following is the next best step?

Protons are found in the nucleus of the atom.