The symbol for the element with the highest electronegativity is ______________

Indicate whether the statement is true or false


F

Physics & Space Science

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A hydrogen atom is excited to the n = 10 stated. It then decays to the n = 4 state by emitting a photon which is detected in a photographic plate

What is the frequency of the detected photon? The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 3.46 × 1014 Hz B) 0.865 × 1014 Hz C) 1.27 × 1014 Hz D) 4.05 × 1014 Hz E) 1.73 × 1014 Hz

Physics & Space Science

How many moles are there in 2.00 kg of copper? The atomic weight of copper is 63.5 g/mol and its density is 8.90 g/cm3

A) 31.5 B) 15.3 C) 53.1 D) 51.3

Physics & Space Science

The pupil of the human eye is approximately 0.8 cm in diameter when adapted to the dark. The ratio of the light-gathering power of a 1.6-m telescope to that of the human eye is ____

a. 2 b. 4 c. 20 d. 400 e. 40,000

Physics & Space Science

A camera lens having a 50-mm focal length is set to f/4.0. What is the minimum spacing of two objects located 12 m from the lens if the objects are just barely resolved in the image using light of wavelength 500 nm?

A) 4.9 × 10-5 m B) 0.024 mm C) 0.59 mm D) 4.72 mm E) 1.66 mm

Physics & Space Science