31. The mass number of a nucleus is:

a) always less than its atomic number: b) the sum of the number of protons and neutrons present in

the nucleus; c) always more than the atomic weight; d) a fraction.

Give the number of s, p, d, and f electrons in the following neutral atom when it is in the ground state.

Which radioisotope has an atom that emits a particle with a mass number of 0 and a charge of + 1? (1) 3H (3) 19Ne (2) 16N (4) 239Pu

5. A plant in a pot of soil is placed in bright sunlight for 12 hours a day. The plant is located near an open window with good air circulation. If the plant is left alone for a month, will it produce glucose? Why or why not?

The Atlantic Ocean is expanding. What does this tell us about plates under the Atlantic Ocean? A. they are being forced down B. they are being force apart C. they are being pressed together D, most likely nothing is happening to the plates

Brass is a combination of a number of elements. Its exact composition can vary.

How many nitrogen atoms are in 2.79 mo. of NH3

What is the chemical formula for polysaccharide?

What is the empirical formula of a compound composed of 32.9g of potassium and 6.73 g of oxygen

Glucose is not made from which of the following

Rank the temperatures from the highest to the lowest. 133F 351K 25C 273K 146C 58F 95F