Which of these groups of elements show the least electronegativity?

A). inner-transition elements

B). halogens (7A)

C). alkali metals (1A)

D). transition elements

E). alkaline earth metals (2A)

Calculate the acceleration due to gravity on the moon. the radius of the moon is about 1.74 x 106 m and its mass is 7.35 x 1022 kg.

A bungee jumper falls 97.2 feet before bouncing back up at the end of his bungee cord. Then he falls 64.8 feet before bouncing up again. On his third descent, he falls 43.2 feet before going back up.

If a person pushes a box up a ramp, in which direction will the box exert a force on the person? up the ramp toward the person down on the ramp

What is the wavelength of visible light of 6 x 1014 Hz frequency?

A tall, cylindrical chimney falls over when its base is ruptured. Treat the chimney as a thin rod of length 58.8 m. At the instant it makes an angle of 30.

Adrian read about a new antimicrobial in a popular magazine. The advertisement claimed that the product Bactokil prevents bacterial growth. So, Adrian conducted a controlled experiment to test the product claims.

A world-class sprinter can burst out of the blocks to essentially top speed (of about 11.5 m/s) in the first 15.0 m of the race. what is the average acceleration of this sprinter, and how long does it take her to reach that speed?

How are primary and secondary succession similar and how are they different?

What relates the net force exerted on an object to its mass and acceleration?

I'm a wave, the medium moves parallel to the direction that the wave travels