The Earth's atmosphere is made up of approximately

__

% nitrogen.

A. 1

B. 21

C. 78

D. none of the above

Which of the following is true about a carbonated soft drink? 1. The carbon dioxide is a solution, and the water is the solvent. 2. The carbon dioxide is a solvent, and the water is the salute. 3.

In a covalent bond: a. An atom gains one or more electrons from another atom to gain stability. b. Adjacent atoms share a single electron. c. An atom loses electrons to another to gain stability. d. Atoms share one or more pairs of electrons.

What group of elements are contained in the p-block? a. 1A c. 3A b. 2A d. 3B Use the periodic table below to answer the following questions.

What is another example of Newton's first law?

The formation of an ionic bond involves the

Which of the following volumes is the smallest?

Which of these are common to all mammals? A: type of reproductive system, brain size, skin B: digestive system, heart lungs C: digestive system, number of toes, blood D: kidneys, liver, skeletal structure

Which explanation best compares the movement of particles in the three states of matter?

A steel tank with a volume of 9.583 L contains N2 gas under a pressure of 4.972 atm at 31.8 °C. Calculate the number of moles of N2 in the tank. a. 0.002 mol c. 0.525 mol b. 0.018 mol d. 1.90 mol

Is phosphorous an atom, element, or compound