A&P Ch. 2

An atom with an atomic number of 10 and a mass number of 24 would have

14 neutrons

How many hydrogen atoms will a single carbon atom bond with to form a stable molecule?

Carbon has four electrons in its valence (outermost) electron shell. Therefore, it will form covalent bonds with four hydrogen atoms. The four electrons contributed by the hydrogen atoms will fill the valence shell of carbon.

What is the difference between kinetic and potential energy?

Kinetic energy is energy in action, while potential energy is stored energy. Kinetic energy is energy in action. We see evidence of kinetic energy in the constant movement of the tiniest particles of matter, as well as in larger objects. Potential energy is stored energy, which has the capacity to do work but is not presently doing so.

Based on the general theme of conservation, which of the following is most likely to happen if an athlete breaks his arm and must wear a cast and not use that arm for six weeks?

Muscles in the injured arm will get smaller because they are not being used.

Which of the following is FALSE?

The weight of matter remains constant wherever it is located. The mass of an object is equal to the actual amount of matter in the object, and it remains constant wherever the object is. In contrast, weight varies with gravity. Matter is anything that occupies space and has mass. With some exceptions, it can be seen, smelled and felt. Matter exists in solid, liquid, or gaseous states.

Not a form of matter

X rays are a type of energy.

hat is the classification of a solution with a pH of 8.3?

alkaline solution: A pH between 0.0 and 7.0 is acidic. A pH between 7.0 and 14.0 is basic. Therefore, a solution with a pH of 8.3 is an alkaline (or basic) solution.

Which of the following best describes an isotope?

an atomic structural variation in which atoms have differing numbers of neutrons. Nearly all known elements have two or more structural variations called isotopes, which have the same number of protons and electrons, but differ in the number of neutrons they contain.

Which four elements comprise approximately 96% of our body weight?

carbon, oxygen, hydrogen, and nitrogen.

When your muscles contract to move your body, such as during walking, work is done, and work requires energy. Based on the Law of Conservation of Energy, from where does this energy come?

chemical energy

Can be measured only by its effects on matter.

energy

although a man who weighs 175 pounds on earth would be lighter on the moon and heavier on jupiter, his ___ would not be different

mass

Anything that occupies space and has mass.

matter

Which of the following is NOT a subatomic particle?

molecule. Atoms are comprised of subatomic particles: protons, electrons, and neutrons. Most atoms do not exist in the free state but instead are chemically combined with other atoms. Such a combination of two or more atoms held together by chemical bonds is called a molecule.

The atomic number of an atom is equal to the number of

protons

Is a function of, and varies with, gravity.

weight