How can you describe the location of hafnium (Hf, atomic number 72) on the periodic table? Choose all that apply.

(A) Transition metals

(B) Noble gases

(C) Group 6, Period 4

(D) Group 4, Period 6

You might have a flashlight that runs (2) d-cells of 1.5 volts each in series. the bulb is rated for 0.7 amps. what's its resistance?

The general term for changing from a liquid to a vapor or a gas is

What physical property would be the most useful in the separation of very fine saw dust and salt?

Balance this equation. If a coefficient of "1" is required, choose "blank" for that box. CO + O2 → CO2

Which part of a light microscope focuses light onto the specimen through the lens? a. The focuser c. The condenser b. The objectives d. The stage

Darwin visited the Galapagos Islands several times. He observed some very unusual species. One species of bird, the finch, interested him. He observed some differences in the finches living on different islands.

Why does land heat up more faster than water?

Which gas law has assumptions of a fixed amount and temperature of a gas

Which scientific tool is the most useful when trying to convert a known amount of grams of water to moles of water?

What is the chemical compound of nitrogen gas?