Prep HW-Ch 2A

would blood be a compound, mixture or element

mixture

homo, will not settle

solutions

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

14 neutrons

If atom X has an atomic number of 74 it would have which of the following?

74 Protons

An atom of oxygen has an atomic number of 8 and a mass number of 18. How many of each type of subatomic particle does it contain?

8 protons, 8 electrons, and 10 neutrons

Blood loss due to a moderate hemorrhage has several adverse effects on patient wellbeing. Why would administering IV fluids alone not be sufficient to return a patient to health?

Oxygen-carrying red blood cells lost along with the fluid component must also be replaced.

Think about a 10% saline solution (saline refers to salt.). Which of the following is a correct statement?

It contains 10% solute and 90% solvent.

Why can dehydration be such a life-threating event?

It significantly alters the ratio of body water (solvent) to dissolved substances (solutes), such as sodium ions.

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 elements is necessary for proper conduction of nerve impulses?

Na

Which of the following best describes an isotope?

an atomic structural variation in which atoms have differing numbers of neutrons

number of protons in an atom

atomic number

usually, the first one or two letters of an element's name

atomic symbol

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

hetero, will not settle

colloids

would dry ice be a compound, mixture or element

compound

would water be a compound, mixture or element

compound

Consider sweetened ice tea. Which of the following is a solute? a. ice b. the beverage itself c. water d. sugar

d.

Which of the following is an example of a suspension? a. rubbing alcohol b. salt water c. cytosol d. blood

d.

Which of the following statements is true concerning the differences between compounds and mixtures? a. Mixtures consist of chemical bonds between the components. b. Compounds can be separated by physical means. c. Mixtures are all heterogeneous. d. Compounds are all homogeneous.

d.

would carbon be a compound, mixture or element

element

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

combined number of protons and neutrons in an atom

mass number of an element

anything that occupies space and has mass

matter

Which subatomic particles contribute to an atom's mass number but not its atomic number?

neutrons

What does CH4 mean?

one carbon and four hydrogen atoms

Which of the following is NOT a compound? Which of the following is NOT a compound? a. water b. methane (natural gas) c. oxygen gas d. carbon dioxide

oxygen gas

Which type(s) of subatomic particles can be located within the nucleus of an atom?

protons and neutrons

Which of the following is the major positive ion outside cells? Which of the following is the major positive ion outside cells?

sodium

will not scatter light

solutions

hetero, will settle

suspensions

is a function of, and varies with, gravity

weight