Which pure substance is made of only one kind of atom?

A. An element

B. Am electron

C. A particle

D. A proton

What is the wavelength of a light frequency 7.21x10^14Hz

You buy helium gas in small pressurized cans to inflate party balloon. The can label indicates that the container delivers 7100 ml of helium gas at 100.0 kpa pressure. The volume of the gas container is 492 ml

How much energy is needed to melt 25.4 grams of l2

Does glycolysis require oxygen?

The neutralization reactions always produced which compound?

Consider the following half-reactions: Half-reaction E° (V) I2 (s) + 2e - 2I - (aq) 0.535V 2H + (aq) + 2e - H2 (g) 0.000V Zn2 + (aq) + 2e - Zn (s) - 0.

Where did the longest tsunami form?

Calculate the number of H atoms in 0.190 mole C 6 H 14 O .

What fuel is produced by the electrolysis of water? chlorine gas hydrogen gas natural gas oxygen gas

Model describe how you would show j. j. thomson's model of the atom using small beads and clay