The time required for a radioactive mass to reduce by a factor of 2 is called:

decay constant

half-life

decay rate

time factor

What is transmutation? the conversion of atoms of one element to atoms of another the movement of protons from one nucleus to another the movement of alpha, beta, and gamma particles through a solid rapid nuclear decay caused by exposure to alpha

The speed of the cart after 8 seconds of Low fan speed is cm/s. The speed of the cart after 3 seconds of Medium fan speed is cm/s. The speed of the cart after 6 seconds of High fan speed is cm/s.

The value of Zeff for a valence electron in an atom of silicon is?

Consider the following reaction: 2NO (g) + O2 (g) →2NO2 (g) Estimate ΔG∘ for this reaction at each of the following temperatures and predict whether or not the reaction will be spontaneous.

O. How many protons, neutrons and electrons are in Neodymium - 144 (Nd-144) ? a. 60. 84, 60 b. 60, 60, 60 C. 60, 144, 60 d. 84. 60. 60

Will a parachute slow a skydiver more at a very high altitude or a lower altitude?

Carbon monoxide is: Only found in large cities An odorless, colorless, toxic gas Healthy to breath in A danger when driving on the open highway

What is a potential benefit of fuel cell cars? increased efficiency converting gasoline to energy no recharging necessary decreased automobile cost larger engines

Water is a great solvent. For example, it causes ionic compounds like sodium chloride (table salt) to dissociate. One of these reasons that water does is because it is polar molecule.

For most compounds with a single keto group in the molecule, equilibrium favors the keto form over the enol form of the compound. this is due largely to what?