Which set of elements have similar physical and chemical properties?

carbon, nitrogen, oxygen

helium neon, argon

hydrogen, lithium, beryllium

fluorine, chlorine, oxygen

What phase change is endothermic

An example of an internal chemical transmitter is a (n) organhormonegland.

What is the name of the compound NiSO4 • 5H2O?

The wavelength of a wave is 0.5 meters, and its period is 2 seconds. What is the speed of this wave?

What practical use does adding salt to water have A. unfreezing glaciers B. freezing the ocean C. keeping ponds liquid D. melting ice on roads and sidewalks

Zn (s) + cu2 + (aq) →zn2 + (aq) + cu (s). part a under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 51.0 g of copper is plated out?

13 This word describes the circulatory system that provides nutrients and oxygen to living cells of the body.

Write the outer electron configuration for the group 15 element in the fourth period.

Describe the relationship between transmittance and the absorbance?

Are the following statements true or false? A. Two pi bonds comprise a double bond. B. Bonds formed from atomic p orbitals are always sigma bonds. C. Side-to-side overlap results in a bond with electron density above and below the bond axis. D.