The family of elements that has a 2 - oxidation number is the:

21. You will need to unplug your tools: a) intermittently during use b) when changing accessories such as blades, bits, and cutters c) when someone is talking to you d) after servicing or cleaning

13. What is a falling objects speed at 6s? 9s? 112s?

This planet is second from the Sun. It is named after the Roman god of beauty. Considered for a long time as Earth's "twin". It is covered in clouds. What is it? O Mercury o Mars O Venus O Jupiter

Calculate the volume of liquid in the round flask sketched below. give your answer in liters, and round to the nearest 0.01l.

Decribe how hydrogen and oxygen form water

Will fluorine form an anion or a cation? Why?

An atom of argon in the ground state tends not to bond with an atom of a different element because the argon atom has 1). More protons than neutrons 2). More neutrons than protons. 3) a total of 2 valence electrons. 4).

When bases dissolve in water they release what type of negative ion?

An acid is added to water, and a new equilibrium is established. What is the system after the acid is added?

The hydrogen spectrum has a red line at 656 nm, and a blue line at 434 nm. What is the first order angular separation between the two spectral lines obtained with a diffraction grating with 5000 rulings/cm? A. 7.7 degrees B. 16.6 degrees C. 6.