What do we call the tiny core at the center of an atom, containing most of the atom's mass and all of its positive charge?

The reactivity of an alkali metal depends on the metal's ability to electrons. True or False

Which of these elements can become stable by losing 1 electron? Explain A. Calcium B. Argon C. Soduim D. Nitrogen E. Oxygen F. Chlorine

a bird flying horizontally accidently drops a rock it was carrying. 2.10s later, the rocks velocity is 22.2m/s in a - 68.2 direction. what was the birds (and rocks) initial velocity

What is's closer vega or Andromeda galaxy?

Given the implications of the hydrostatic equation, we would expect that Group of answer choices A) Differences in temperature on either side of a cold front should not have any significant effect on upper-level pressure.

Sound travels 2146 m through a material in 1.4 seconds. What is the material?

What two pieces of data indicates that uranus resides in the outer layer of the solar system.

What is acceleration? a. change in velocity/change in time b. change in distance/change in time c. change in mass/change in volume d. change in pressure/change in time

Brittany stands at rest on a skateboard. the combined mass of brittany and the skateboard is 62 kg. dave tosses a 3.7-kg pumpkin to brittany, and when she catches it, she and the skateboard begin to roll backward with a speed of 0.16 m/s.

The maximum restoring force that can be applied to the disk without breaking it is 40000 n. what is the maximum oscillation amplitude that won't rupture the disk