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2. Isotopes of silicon - Wikipedia

   en.wikipedia.org/wiki/Isotopes_of_silicon

   Isotopes of silicon (14Si) Silicon (14 Si) has 23 known isotopes, with mass numbers ranging from 22 to 44. 28 Si (the most abundant isotope, at 92.23%), 29 Si (4.67%), and 30 Si (3.1%) are stable. The longest-lived radioisotope is 32 Si, which is produced by cosmic ray spallation of argon. Its half-life has been determined to be approximately ...

3. 28 (number) - Wikipedia

   en.wikipedia.org/wiki/28_(number)

   In mathematics. The number 28 depicted as 28 balls arranged in a triangular pattern with the number of layers of 7. 28 as the sum of four nonzero squares. It is a composite number; a square-prime, of the form (p2,q) where q is a higher prime. It is the third of this form and of the specific form (2 2.q), with proper divisors being 1, 2, 4, 7 ...

4. IRS tax forms - Wikipedia

   en.wikipedia.org/wiki/IRS_tax_forms

   [25] [26] [27] The form has many variants for corporations with different structures; the most common variant is the Form 1120S used by S corporations. [28] [29] Form 1120 consists of 1 page with 36 lines and 6 additional schedules. Lines 1-11 deal with income, lines 12−29 deal with deductions, and lines 30-36 deal with tax, refundable ...

5. Pregnancy Timeline: Fetal Development Week-by-Week ... - WebMD

   www.webmd.com/baby/interactive-pregnancy-tool...

   Track your baby’s growth using this simple visual timeline. Trimester 1. weeks 1 - 13. Trimester 2. weeks 14 - 26. Trimester 3. weeks 27 - 40. Use our Pregnancy Calendar for daily pregnancy tips ...

6. 29 (number) - Wikipedia

   en.wikipedia.org/wiki/29_(number)

   29 (number) 29 (twenty-nine) is the natural number following 28 and preceding 30. It is a prime number. 29 is the number of days February has on a leap year.

7. 30 (number) - Wikipedia

   en.wikipedia.org/wiki/30_(number)

   30 is a square pyramidal number. 30 is an even, composite, pronic number. With 2, 3, and 5 as its prime factors, it is a regular number and the first sphenic number, the smallest of the form , where r is a prime greater than 3. It has an aliquot sum of 42; within an aliquot sequence of thirteen composite numbers (30, 42, 54, 66, 78, 90, 144 ...

8. Understanding Insulin Syringes Sizes - Healthline

   www.healthline.com/health/diabetes/insulin...

   0.3 mL syringes are for insulin doses under 30 units of insulin and are numbered ... 30 units of insulin: 3/16 inch (5 mm) 28: ... 30 to 50 units of insulin: 5/16 inch (8 mm) 29, 30: 1.0 mL > 50 ...

9. Cancerous Skin Tags: Pictures and When to See a Doctor

   www.healthline.com/health/cancerous-skin-tags

   A skin tag is a flesh-colored growth on the skin. It can be thin looking or round. A skin tag can look like it’s dangling from a stalk. Skin tags tend to be 2–5 millimeters in size, though ...