Which is true about metalloids?

a. are more metallic than non-metallic

b. next to the "staircase" on the periodic table

c. always have 4 e - in the valence shell

d. examples include Al and B

Which noble gas is closest to magnesium

If the vapor pressure of a liquid is being measured with a manometer, what will happen to the mercury levels on each side if the vapor pressure of the liquid is increased? a. One side's level will go up and one side's level will go down. b.

How many molecules are in 1 mole of H2O molecules?

A rocket uses an engine that creates thrust through the combustion of a liquid fuel and an oxidizer. What kind of rocket is this?

An aerosol is a colloidal A. Gas B. Solid C. Liquid

If an element has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass?

What did the Cherokee do to assimilate? Check all that apply They invented a writing system. They resisted white settlement. They wrote a constitution. They planted cotton and farmed.

Which of the following correctly compares the radii of Cl and Cl-? Cl has a larger radius than Cl - because Cl has an additional energy shell. Cl has a smaller radius than Cl - because Cl has an expanded electron cloud.

When a stretched string is vibrated up and down with a particular frequency, it causes a standing wave to be produced.

Find the concentration of a solution with 30 grams of solute in 250 grams of solution.