According to the Bohr model, the radius of a hydrogen atom is approximately 5.29 × 10-11 meters.
2 answers:
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Area = 20
perimeter = 21
perimeter = 21
Answer:
Step-by-step explanation:
To factor the equation, break it into two binomials which multiply to make the equation. To write these binomials (x+a)(x+b), find factors which multiply to -20 and add to -1 for a and b.
20: 1, 2, 4, 5, 10, 20
-5+4 = -1